Abstract

Polar magneto-optical Kerr effect (MOKE) spectroscopy in the energy range from 1.75 eV to 5 eV at different magnetic field strength was applied to study Ni nanostructures formed on rubrene nanoislands. The magnetic hysteresis curves measured by MOKE change the shape depending on the photon energy and therefore deviate from those measured by superconducting quantum interference device (SQUID) magnetometry. Similar optical effects were previously observed in inorganic heterostructures. Our observations show that it correlates to the change in lineshape of the MOKE rotation and ellipticity spectra as a function of magnetic field strength. We show that this spectral dependence on magnetic field can be exploited to separate the contributions of two magnetic components to the magneto-optical spectra and hysteresis. The proposed model does not require the a priori knowledge of the (magneto-)optical constants of the heterostructure and its components.

© 2014 Optical Society of America

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  1. J. Ferré, P. Meyer, M. Nyvlt, S. Visnovsky, and D. Renard, “Magnetooptic depth sensitivity in a simple ultrathin film structure,” J. Magn. Magn. Mater. 165(1–3), 92–95 (1997).
    [CrossRef]
  2. Th. Herrmann, K. Lüdge, W. Richter, K. G. Georgarakis, P. Poulopoulos, R. Nünthel, J. Lindner, M. Wahl, and N. Esser, “Optical anisotropy and magneto-optical properties of Ni on preoxidized Cu(110),” Phys. Rev. B 73, 134408 (2006).
  3. G. R. Harp, D. Weller, T. A. Rabedeau, R. F. C. Farrow, and M. F. Toney, “Magneto-optical Kerr spectroscopy of a new chemically ordered alloy: Co3Pt,” Phys. Rev. Lett. 71(15), 2493–2496 (1993).
    [CrossRef] [PubMed]
  4. M. Fronk, B. Bräuer, J. Kortus, O.G. Schmidt, D.R.T. Zahn, and G. Salvan, “Determination of the Voigt constant of phthalocyanines by magneto-optical Kerr-effect spectroscopy,” Phys. Rev. B 79, 235305 (2009).
  5. B. Bräuer, M. Fronk, D. Lehmann, D. R. T. Zahn, and G. Salvan, “Magneto-optical Kerr effect spectroscopy--a sensitive tool for investigating the molecular orientation in organic semiconductor films,” J. Phys. Chem. B 113(45), 14957–14961 (2009).
    [CrossRef] [PubMed]
  6. K. Ishii and K. Ozawa, “Local-field-induced effective magnetic hysteresis of molecular magneto-optical effects in the visible region at room temperature: phthalocyanine thin films on ferromagnetic inorganic substrates,” J. Phys. Chem. C 113(43), 18897–18901 (2009).
    [CrossRef]
  7. T. Kitaguchi, T. Katayama, Y. Suzuki, N. Tsukane, and N. Koshizuka, “Organic dyes/co hybrid double layered film,” Jpn. J. Appl. Phys. 30(12A), 3377–3380 (1991).
    [CrossRef]
  8. W. Li, M. Fronk, H. Kupfer, S. Schulze, M. Hietschold, D. R. T. Zahn, and G. Salvan, “Aging of rubrene layers in Ni/rubrene heterostructures studied by magneto-optical Kerr effect spectroscopy,” J. Am. Chem. Soc. 132(16), 5687–5692 (2010).
    [CrossRef] [PubMed]
  9. L. F. Holiday and U. J. Gibson, “Improved longitudinal magneto-optic Kerr effect signal contrast from nanomagnets with dielectric coatings,” Opt. Express 14(26), 13007–13013 (2006).
    [CrossRef] [PubMed]
  10. N. Qureshi, H. Schmidt, and A. R. Hawkins, “Cavity enhancement of the magneto-optic Kerr effect for optical studies of magnetic nanostructures,” Appl. Phys. Lett. 85(3), 431–433 (2004).
    [CrossRef]
  11. S. Visnovsky, K. Postava, and T. Yamaguchi, “Magneto-optic polar Kerr and Faraday effects in periodic multilayers,” Opt. Express 9(3), 158–171 (2001).
    [CrossRef] [PubMed]
  12. V. C. Sundar, J. Zaumseil, V. Podzorov, E. Menard, R. L. Willett, T. Someya, M. E. Gershenson, and J. A. Rogers, “Elastomeric transistor stamps: reversible probing of charge transport in organic crystals,” Science 303(5664), 1644–1646 (2004).
    [CrossRef] [PubMed]
  13. V. A. Dediu, L. E. Hueso, I. Bergenti, and C. Taliani, “Spin routes in organic semiconductors,” Nat. Mater. 8(9), 707–716 (2009).
    [CrossRef] [PubMed]
  14. D. Käfer and G. Witte, “Growth of crystalline rubrene films with enhanced stability,” Phys. Chem. Chem. Phys. 7(15), 2850–2853 (2005).
    [CrossRef] [PubMed]
  15. P. R. Ribič and G. Bratina, “Initial stages of growth of organic semiconductors on vicinal (0 0 0 1) sapphire surfaces,” Surf. Sci. 602(7), 1368–1375 (2008).
    [CrossRef]
  16. K. Postava, D. Hrabovský, O. Životský, J. Pištora, N. Dix, R. Muralidharan, J. M. Caicedo, F. Sánchez, and J. Fontcuberta, “Magneto-optic material selectivity in self-assembled BiFeO3–CoFe2O4 biferroic nanostructures,” J. Appl. Phys. 105, 07C124 (2009).
  17. J. Hwang, A. Wan, and A. Kahn, “Energetics of metal–organic interfaces: New experiments and assessment of the field,” Mater. Sci. Eng. 4(1–2), 1–31 (2009).
    [CrossRef]
  18. G. C. Papaefthymiou, “Nanoparticle magnetism,” Nano Today 4(5), 438–447 (2009).
    [CrossRef]
  19. W. Li, “Inorganic samples with two magnetic phases,” in Magneto-Optical Kerr Effect Spectroscopy Study of Ferromagnetic Metal/Organic Heterostructures, PhD Thesis (Technische Universität Chemnitz, Chemnitz, 2010).
  20. O. Hellwig, J. K. Bosworth, E. Dobisz, D. Kercher, T. Hauet, G. Zeltzer, J. D. Risner-Jamtgaard, D. Yaney, and R. Ruiz, “Bit patterned media based on block copolymer directed assembly with narrow magnetic switching field distribution,” Appl. Phys. Lett. 96, 052511 (2010).

2010 (2)

W. Li, M. Fronk, H. Kupfer, S. Schulze, M. Hietschold, D. R. T. Zahn, and G. Salvan, “Aging of rubrene layers in Ni/rubrene heterostructures studied by magneto-optical Kerr effect spectroscopy,” J. Am. Chem. Soc. 132(16), 5687–5692 (2010).
[CrossRef] [PubMed]

O. Hellwig, J. K. Bosworth, E. Dobisz, D. Kercher, T. Hauet, G. Zeltzer, J. D. Risner-Jamtgaard, D. Yaney, and R. Ruiz, “Bit patterned media based on block copolymer directed assembly with narrow magnetic switching field distribution,” Appl. Phys. Lett. 96, 052511 (2010).

2009 (7)

M. Fronk, B. Bräuer, J. Kortus, O.G. Schmidt, D.R.T. Zahn, and G. Salvan, “Determination of the Voigt constant of phthalocyanines by magneto-optical Kerr-effect spectroscopy,” Phys. Rev. B 79, 235305 (2009).

B. Bräuer, M. Fronk, D. Lehmann, D. R. T. Zahn, and G. Salvan, “Magneto-optical Kerr effect spectroscopy--a sensitive tool for investigating the molecular orientation in organic semiconductor films,” J. Phys. Chem. B 113(45), 14957–14961 (2009).
[CrossRef] [PubMed]

K. Ishii and K. Ozawa, “Local-field-induced effective magnetic hysteresis of molecular magneto-optical effects in the visible region at room temperature: phthalocyanine thin films on ferromagnetic inorganic substrates,” J. Phys. Chem. C 113(43), 18897–18901 (2009).
[CrossRef]

V. A. Dediu, L. E. Hueso, I. Bergenti, and C. Taliani, “Spin routes in organic semiconductors,” Nat. Mater. 8(9), 707–716 (2009).
[CrossRef] [PubMed]

K. Postava, D. Hrabovský, O. Životský, J. Pištora, N. Dix, R. Muralidharan, J. M. Caicedo, F. Sánchez, and J. Fontcuberta, “Magneto-optic material selectivity in self-assembled BiFeO3–CoFe2O4 biferroic nanostructures,” J. Appl. Phys. 105, 07C124 (2009).

J. Hwang, A. Wan, and A. Kahn, “Energetics of metal–organic interfaces: New experiments and assessment of the field,” Mater. Sci. Eng. 4(1–2), 1–31 (2009).
[CrossRef]

G. C. Papaefthymiou, “Nanoparticle magnetism,” Nano Today 4(5), 438–447 (2009).
[CrossRef]

2008 (1)

P. R. Ribič and G. Bratina, “Initial stages of growth of organic semiconductors on vicinal (0 0 0 1) sapphire surfaces,” Surf. Sci. 602(7), 1368–1375 (2008).
[CrossRef]

2006 (2)

Th. Herrmann, K. Lüdge, W. Richter, K. G. Georgarakis, P. Poulopoulos, R. Nünthel, J. Lindner, M. Wahl, and N. Esser, “Optical anisotropy and magneto-optical properties of Ni on preoxidized Cu(110),” Phys. Rev. B 73, 134408 (2006).

L. F. Holiday and U. J. Gibson, “Improved longitudinal magneto-optic Kerr effect signal contrast from nanomagnets with dielectric coatings,” Opt. Express 14(26), 13007–13013 (2006).
[CrossRef] [PubMed]

2005 (1)

D. Käfer and G. Witte, “Growth of crystalline rubrene films with enhanced stability,” Phys. Chem. Chem. Phys. 7(15), 2850–2853 (2005).
[CrossRef] [PubMed]

2004 (2)

V. C. Sundar, J. Zaumseil, V. Podzorov, E. Menard, R. L. Willett, T. Someya, M. E. Gershenson, and J. A. Rogers, “Elastomeric transistor stamps: reversible probing of charge transport in organic crystals,” Science 303(5664), 1644–1646 (2004).
[CrossRef] [PubMed]

N. Qureshi, H. Schmidt, and A. R. Hawkins, “Cavity enhancement of the magneto-optic Kerr effect for optical studies of magnetic nanostructures,” Appl. Phys. Lett. 85(3), 431–433 (2004).
[CrossRef]

2001 (1)

1997 (1)

J. Ferré, P. Meyer, M. Nyvlt, S. Visnovsky, and D. Renard, “Magnetooptic depth sensitivity in a simple ultrathin film structure,” J. Magn. Magn. Mater. 165(1–3), 92–95 (1997).
[CrossRef]

1993 (1)

G. R. Harp, D. Weller, T. A. Rabedeau, R. F. C. Farrow, and M. F. Toney, “Magneto-optical Kerr spectroscopy of a new chemically ordered alloy: Co3Pt,” Phys. Rev. Lett. 71(15), 2493–2496 (1993).
[CrossRef] [PubMed]

1991 (1)

T. Kitaguchi, T. Katayama, Y. Suzuki, N. Tsukane, and N. Koshizuka, “Organic dyes/co hybrid double layered film,” Jpn. J. Appl. Phys. 30(12A), 3377–3380 (1991).
[CrossRef]

Bergenti, I.

V. A. Dediu, L. E. Hueso, I. Bergenti, and C. Taliani, “Spin routes in organic semiconductors,” Nat. Mater. 8(9), 707–716 (2009).
[CrossRef] [PubMed]

Bosworth, J. K.

O. Hellwig, J. K. Bosworth, E. Dobisz, D. Kercher, T. Hauet, G. Zeltzer, J. D. Risner-Jamtgaard, D. Yaney, and R. Ruiz, “Bit patterned media based on block copolymer directed assembly with narrow magnetic switching field distribution,” Appl. Phys. Lett. 96, 052511 (2010).

Bratina, G.

P. R. Ribič and G. Bratina, “Initial stages of growth of organic semiconductors on vicinal (0 0 0 1) sapphire surfaces,” Surf. Sci. 602(7), 1368–1375 (2008).
[CrossRef]

Bräuer, B.

M. Fronk, B. Bräuer, J. Kortus, O.G. Schmidt, D.R.T. Zahn, and G. Salvan, “Determination of the Voigt constant of phthalocyanines by magneto-optical Kerr-effect spectroscopy,” Phys. Rev. B 79, 235305 (2009).

B. Bräuer, M. Fronk, D. Lehmann, D. R. T. Zahn, and G. Salvan, “Magneto-optical Kerr effect spectroscopy--a sensitive tool for investigating the molecular orientation in organic semiconductor films,” J. Phys. Chem. B 113(45), 14957–14961 (2009).
[CrossRef] [PubMed]

Caicedo, J. M.

K. Postava, D. Hrabovský, O. Životský, J. Pištora, N. Dix, R. Muralidharan, J. M. Caicedo, F. Sánchez, and J. Fontcuberta, “Magneto-optic material selectivity in self-assembled BiFeO3–CoFe2O4 biferroic nanostructures,” J. Appl. Phys. 105, 07C124 (2009).

Dediu, V. A.

V. A. Dediu, L. E. Hueso, I. Bergenti, and C. Taliani, “Spin routes in organic semiconductors,” Nat. Mater. 8(9), 707–716 (2009).
[CrossRef] [PubMed]

Dix, N.

K. Postava, D. Hrabovský, O. Životský, J. Pištora, N. Dix, R. Muralidharan, J. M. Caicedo, F. Sánchez, and J. Fontcuberta, “Magneto-optic material selectivity in self-assembled BiFeO3–CoFe2O4 biferroic nanostructures,” J. Appl. Phys. 105, 07C124 (2009).

Dobisz, E.

O. Hellwig, J. K. Bosworth, E. Dobisz, D. Kercher, T. Hauet, G. Zeltzer, J. D. Risner-Jamtgaard, D. Yaney, and R. Ruiz, “Bit patterned media based on block copolymer directed assembly with narrow magnetic switching field distribution,” Appl. Phys. Lett. 96, 052511 (2010).

Esser, N.

Th. Herrmann, K. Lüdge, W. Richter, K. G. Georgarakis, P. Poulopoulos, R. Nünthel, J. Lindner, M. Wahl, and N. Esser, “Optical anisotropy and magneto-optical properties of Ni on preoxidized Cu(110),” Phys. Rev. B 73, 134408 (2006).

Farrow, R. F. C.

G. R. Harp, D. Weller, T. A. Rabedeau, R. F. C. Farrow, and M. F. Toney, “Magneto-optical Kerr spectroscopy of a new chemically ordered alloy: Co3Pt,” Phys. Rev. Lett. 71(15), 2493–2496 (1993).
[CrossRef] [PubMed]

Ferré, J.

J. Ferré, P. Meyer, M. Nyvlt, S. Visnovsky, and D. Renard, “Magnetooptic depth sensitivity in a simple ultrathin film structure,” J. Magn. Magn. Mater. 165(1–3), 92–95 (1997).
[CrossRef]

Fontcuberta, J.

K. Postava, D. Hrabovský, O. Životský, J. Pištora, N. Dix, R. Muralidharan, J. M. Caicedo, F. Sánchez, and J. Fontcuberta, “Magneto-optic material selectivity in self-assembled BiFeO3–CoFe2O4 biferroic nanostructures,” J. Appl. Phys. 105, 07C124 (2009).

Fronk, M.

W. Li, M. Fronk, H. Kupfer, S. Schulze, M. Hietschold, D. R. T. Zahn, and G. Salvan, “Aging of rubrene layers in Ni/rubrene heterostructures studied by magneto-optical Kerr effect spectroscopy,” J. Am. Chem. Soc. 132(16), 5687–5692 (2010).
[CrossRef] [PubMed]

B. Bräuer, M. Fronk, D. Lehmann, D. R. T. Zahn, and G. Salvan, “Magneto-optical Kerr effect spectroscopy--a sensitive tool for investigating the molecular orientation in organic semiconductor films,” J. Phys. Chem. B 113(45), 14957–14961 (2009).
[CrossRef] [PubMed]

M. Fronk, B. Bräuer, J. Kortus, O.G. Schmidt, D.R.T. Zahn, and G. Salvan, “Determination of the Voigt constant of phthalocyanines by magneto-optical Kerr-effect spectroscopy,” Phys. Rev. B 79, 235305 (2009).

Georgarakis, K. G.

Th. Herrmann, K. Lüdge, W. Richter, K. G. Georgarakis, P. Poulopoulos, R. Nünthel, J. Lindner, M. Wahl, and N. Esser, “Optical anisotropy and magneto-optical properties of Ni on preoxidized Cu(110),” Phys. Rev. B 73, 134408 (2006).

Gershenson, M. E.

V. C. Sundar, J. Zaumseil, V. Podzorov, E. Menard, R. L. Willett, T. Someya, M. E. Gershenson, and J. A. Rogers, “Elastomeric transistor stamps: reversible probing of charge transport in organic crystals,” Science 303(5664), 1644–1646 (2004).
[CrossRef] [PubMed]

Gibson, U. J.

Harp, G. R.

G. R. Harp, D. Weller, T. A. Rabedeau, R. F. C. Farrow, and M. F. Toney, “Magneto-optical Kerr spectroscopy of a new chemically ordered alloy: Co3Pt,” Phys. Rev. Lett. 71(15), 2493–2496 (1993).
[CrossRef] [PubMed]

Hauet, T.

O. Hellwig, J. K. Bosworth, E. Dobisz, D. Kercher, T. Hauet, G. Zeltzer, J. D. Risner-Jamtgaard, D. Yaney, and R. Ruiz, “Bit patterned media based on block copolymer directed assembly with narrow magnetic switching field distribution,” Appl. Phys. Lett. 96, 052511 (2010).

Hawkins, A. R.

N. Qureshi, H. Schmidt, and A. R. Hawkins, “Cavity enhancement of the magneto-optic Kerr effect for optical studies of magnetic nanostructures,” Appl. Phys. Lett. 85(3), 431–433 (2004).
[CrossRef]

Hellwig, O.

O. Hellwig, J. K. Bosworth, E. Dobisz, D. Kercher, T. Hauet, G. Zeltzer, J. D. Risner-Jamtgaard, D. Yaney, and R. Ruiz, “Bit patterned media based on block copolymer directed assembly with narrow magnetic switching field distribution,” Appl. Phys. Lett. 96, 052511 (2010).

Herrmann, Th.

Th. Herrmann, K. Lüdge, W. Richter, K. G. Georgarakis, P. Poulopoulos, R. Nünthel, J. Lindner, M. Wahl, and N. Esser, “Optical anisotropy and magneto-optical properties of Ni on preoxidized Cu(110),” Phys. Rev. B 73, 134408 (2006).

Hietschold, M.

W. Li, M. Fronk, H. Kupfer, S. Schulze, M. Hietschold, D. R. T. Zahn, and G. Salvan, “Aging of rubrene layers in Ni/rubrene heterostructures studied by magneto-optical Kerr effect spectroscopy,” J. Am. Chem. Soc. 132(16), 5687–5692 (2010).
[CrossRef] [PubMed]

Holiday, L. F.

Hrabovský, D.

K. Postava, D. Hrabovský, O. Životský, J. Pištora, N. Dix, R. Muralidharan, J. M. Caicedo, F. Sánchez, and J. Fontcuberta, “Magneto-optic material selectivity in self-assembled BiFeO3–CoFe2O4 biferroic nanostructures,” J. Appl. Phys. 105, 07C124 (2009).

Hueso, L. E.

V. A. Dediu, L. E. Hueso, I. Bergenti, and C. Taliani, “Spin routes in organic semiconductors,” Nat. Mater. 8(9), 707–716 (2009).
[CrossRef] [PubMed]

Hwang, J.

J. Hwang, A. Wan, and A. Kahn, “Energetics of metal–organic interfaces: New experiments and assessment of the field,” Mater. Sci. Eng. 4(1–2), 1–31 (2009).
[CrossRef]

Ishii, K.

K. Ishii and K. Ozawa, “Local-field-induced effective magnetic hysteresis of molecular magneto-optical effects in the visible region at room temperature: phthalocyanine thin films on ferromagnetic inorganic substrates,” J. Phys. Chem. C 113(43), 18897–18901 (2009).
[CrossRef]

Käfer, D.

D. Käfer and G. Witte, “Growth of crystalline rubrene films with enhanced stability,” Phys. Chem. Chem. Phys. 7(15), 2850–2853 (2005).
[CrossRef] [PubMed]

Kahn, A.

J. Hwang, A. Wan, and A. Kahn, “Energetics of metal–organic interfaces: New experiments and assessment of the field,” Mater. Sci. Eng. 4(1–2), 1–31 (2009).
[CrossRef]

Katayama, T.

T. Kitaguchi, T. Katayama, Y. Suzuki, N. Tsukane, and N. Koshizuka, “Organic dyes/co hybrid double layered film,” Jpn. J. Appl. Phys. 30(12A), 3377–3380 (1991).
[CrossRef]

Kercher, D.

O. Hellwig, J. K. Bosworth, E. Dobisz, D. Kercher, T. Hauet, G. Zeltzer, J. D. Risner-Jamtgaard, D. Yaney, and R. Ruiz, “Bit patterned media based on block copolymer directed assembly with narrow magnetic switching field distribution,” Appl. Phys. Lett. 96, 052511 (2010).

Kitaguchi, T.

T. Kitaguchi, T. Katayama, Y. Suzuki, N. Tsukane, and N. Koshizuka, “Organic dyes/co hybrid double layered film,” Jpn. J. Appl. Phys. 30(12A), 3377–3380 (1991).
[CrossRef]

Kortus, J.

M. Fronk, B. Bräuer, J. Kortus, O.G. Schmidt, D.R.T. Zahn, and G. Salvan, “Determination of the Voigt constant of phthalocyanines by magneto-optical Kerr-effect spectroscopy,” Phys. Rev. B 79, 235305 (2009).

Koshizuka, N.

T. Kitaguchi, T. Katayama, Y. Suzuki, N. Tsukane, and N. Koshizuka, “Organic dyes/co hybrid double layered film,” Jpn. J. Appl. Phys. 30(12A), 3377–3380 (1991).
[CrossRef]

Kupfer, H.

W. Li, M. Fronk, H. Kupfer, S. Schulze, M. Hietschold, D. R. T. Zahn, and G. Salvan, “Aging of rubrene layers in Ni/rubrene heterostructures studied by magneto-optical Kerr effect spectroscopy,” J. Am. Chem. Soc. 132(16), 5687–5692 (2010).
[CrossRef] [PubMed]

Lehmann, D.

B. Bräuer, M. Fronk, D. Lehmann, D. R. T. Zahn, and G. Salvan, “Magneto-optical Kerr effect spectroscopy--a sensitive tool for investigating the molecular orientation in organic semiconductor films,” J. Phys. Chem. B 113(45), 14957–14961 (2009).
[CrossRef] [PubMed]

Li, W.

W. Li, M. Fronk, H. Kupfer, S. Schulze, M. Hietschold, D. R. T. Zahn, and G. Salvan, “Aging of rubrene layers in Ni/rubrene heterostructures studied by magneto-optical Kerr effect spectroscopy,” J. Am. Chem. Soc. 132(16), 5687–5692 (2010).
[CrossRef] [PubMed]

Lindner, J.

Th. Herrmann, K. Lüdge, W. Richter, K. G. Georgarakis, P. Poulopoulos, R. Nünthel, J. Lindner, M. Wahl, and N. Esser, “Optical anisotropy and magneto-optical properties of Ni on preoxidized Cu(110),” Phys. Rev. B 73, 134408 (2006).

Lüdge, K.

Th. Herrmann, K. Lüdge, W. Richter, K. G. Georgarakis, P. Poulopoulos, R. Nünthel, J. Lindner, M. Wahl, and N. Esser, “Optical anisotropy and magneto-optical properties of Ni on preoxidized Cu(110),” Phys. Rev. B 73, 134408 (2006).

Menard, E.

V. C. Sundar, J. Zaumseil, V. Podzorov, E. Menard, R. L. Willett, T. Someya, M. E. Gershenson, and J. A. Rogers, “Elastomeric transistor stamps: reversible probing of charge transport in organic crystals,” Science 303(5664), 1644–1646 (2004).
[CrossRef] [PubMed]

Meyer, P.

J. Ferré, P. Meyer, M. Nyvlt, S. Visnovsky, and D. Renard, “Magnetooptic depth sensitivity in a simple ultrathin film structure,” J. Magn. Magn. Mater. 165(1–3), 92–95 (1997).
[CrossRef]

Muralidharan, R.

K. Postava, D. Hrabovský, O. Životský, J. Pištora, N. Dix, R. Muralidharan, J. M. Caicedo, F. Sánchez, and J. Fontcuberta, “Magneto-optic material selectivity in self-assembled BiFeO3–CoFe2O4 biferroic nanostructures,” J. Appl. Phys. 105, 07C124 (2009).

Nünthel, R.

Th. Herrmann, K. Lüdge, W. Richter, K. G. Georgarakis, P. Poulopoulos, R. Nünthel, J. Lindner, M. Wahl, and N. Esser, “Optical anisotropy and magneto-optical properties of Ni on preoxidized Cu(110),” Phys. Rev. B 73, 134408 (2006).

Nyvlt, M.

J. Ferré, P. Meyer, M. Nyvlt, S. Visnovsky, and D. Renard, “Magnetooptic depth sensitivity in a simple ultrathin film structure,” J. Magn. Magn. Mater. 165(1–3), 92–95 (1997).
[CrossRef]

Ozawa, K.

K. Ishii and K. Ozawa, “Local-field-induced effective magnetic hysteresis of molecular magneto-optical effects in the visible region at room temperature: phthalocyanine thin films on ferromagnetic inorganic substrates,” J. Phys. Chem. C 113(43), 18897–18901 (2009).
[CrossRef]

Papaefthymiou, G. C.

G. C. Papaefthymiou, “Nanoparticle magnetism,” Nano Today 4(5), 438–447 (2009).
[CrossRef]

Pištora, J.

K. Postava, D. Hrabovský, O. Životský, J. Pištora, N. Dix, R. Muralidharan, J. M. Caicedo, F. Sánchez, and J. Fontcuberta, “Magneto-optic material selectivity in self-assembled BiFeO3–CoFe2O4 biferroic nanostructures,” J. Appl. Phys. 105, 07C124 (2009).

Podzorov, V.

V. C. Sundar, J. Zaumseil, V. Podzorov, E. Menard, R. L. Willett, T. Someya, M. E. Gershenson, and J. A. Rogers, “Elastomeric transistor stamps: reversible probing of charge transport in organic crystals,” Science 303(5664), 1644–1646 (2004).
[CrossRef] [PubMed]

Postava, K.

K. Postava, D. Hrabovský, O. Životský, J. Pištora, N. Dix, R. Muralidharan, J. M. Caicedo, F. Sánchez, and J. Fontcuberta, “Magneto-optic material selectivity in self-assembled BiFeO3–CoFe2O4 biferroic nanostructures,” J. Appl. Phys. 105, 07C124 (2009).

S. Visnovsky, K. Postava, and T. Yamaguchi, “Magneto-optic polar Kerr and Faraday effects in periodic multilayers,” Opt. Express 9(3), 158–171 (2001).
[CrossRef] [PubMed]

Poulopoulos, P.

Th. Herrmann, K. Lüdge, W. Richter, K. G. Georgarakis, P. Poulopoulos, R. Nünthel, J. Lindner, M. Wahl, and N. Esser, “Optical anisotropy and magneto-optical properties of Ni on preoxidized Cu(110),” Phys. Rev. B 73, 134408 (2006).

Qureshi, N.

N. Qureshi, H. Schmidt, and A. R. Hawkins, “Cavity enhancement of the magneto-optic Kerr effect for optical studies of magnetic nanostructures,” Appl. Phys. Lett. 85(3), 431–433 (2004).
[CrossRef]

Rabedeau, T. A.

G. R. Harp, D. Weller, T. A. Rabedeau, R. F. C. Farrow, and M. F. Toney, “Magneto-optical Kerr spectroscopy of a new chemically ordered alloy: Co3Pt,” Phys. Rev. Lett. 71(15), 2493–2496 (1993).
[CrossRef] [PubMed]

Renard, D.

J. Ferré, P. Meyer, M. Nyvlt, S. Visnovsky, and D. Renard, “Magnetooptic depth sensitivity in a simple ultrathin film structure,” J. Magn. Magn. Mater. 165(1–3), 92–95 (1997).
[CrossRef]

Ribic, P. R.

P. R. Ribič and G. Bratina, “Initial stages of growth of organic semiconductors on vicinal (0 0 0 1) sapphire surfaces,” Surf. Sci. 602(7), 1368–1375 (2008).
[CrossRef]

Richter, W.

Th. Herrmann, K. Lüdge, W. Richter, K. G. Georgarakis, P. Poulopoulos, R. Nünthel, J. Lindner, M. Wahl, and N. Esser, “Optical anisotropy and magneto-optical properties of Ni on preoxidized Cu(110),” Phys. Rev. B 73, 134408 (2006).

Risner-Jamtgaard, J. D.

O. Hellwig, J. K. Bosworth, E. Dobisz, D. Kercher, T. Hauet, G. Zeltzer, J. D. Risner-Jamtgaard, D. Yaney, and R. Ruiz, “Bit patterned media based on block copolymer directed assembly with narrow magnetic switching field distribution,” Appl. Phys. Lett. 96, 052511 (2010).

Rogers, J. A.

V. C. Sundar, J. Zaumseil, V. Podzorov, E. Menard, R. L. Willett, T. Someya, M. E. Gershenson, and J. A. Rogers, “Elastomeric transistor stamps: reversible probing of charge transport in organic crystals,” Science 303(5664), 1644–1646 (2004).
[CrossRef] [PubMed]

Ruiz, R.

O. Hellwig, J. K. Bosworth, E. Dobisz, D. Kercher, T. Hauet, G. Zeltzer, J. D. Risner-Jamtgaard, D. Yaney, and R. Ruiz, “Bit patterned media based on block copolymer directed assembly with narrow magnetic switching field distribution,” Appl. Phys. Lett. 96, 052511 (2010).

Salvan, G.

W. Li, M. Fronk, H. Kupfer, S. Schulze, M. Hietschold, D. R. T. Zahn, and G. Salvan, “Aging of rubrene layers in Ni/rubrene heterostructures studied by magneto-optical Kerr effect spectroscopy,” J. Am. Chem. Soc. 132(16), 5687–5692 (2010).
[CrossRef] [PubMed]

M. Fronk, B. Bräuer, J. Kortus, O.G. Schmidt, D.R.T. Zahn, and G. Salvan, “Determination of the Voigt constant of phthalocyanines by magneto-optical Kerr-effect spectroscopy,” Phys. Rev. B 79, 235305 (2009).

B. Bräuer, M. Fronk, D. Lehmann, D. R. T. Zahn, and G. Salvan, “Magneto-optical Kerr effect spectroscopy--a sensitive tool for investigating the molecular orientation in organic semiconductor films,” J. Phys. Chem. B 113(45), 14957–14961 (2009).
[CrossRef] [PubMed]

Sánchez, F.

K. Postava, D. Hrabovský, O. Životský, J. Pištora, N. Dix, R. Muralidharan, J. M. Caicedo, F. Sánchez, and J. Fontcuberta, “Magneto-optic material selectivity in self-assembled BiFeO3–CoFe2O4 biferroic nanostructures,” J. Appl. Phys. 105, 07C124 (2009).

Schmidt, H.

N. Qureshi, H. Schmidt, and A. R. Hawkins, “Cavity enhancement of the magneto-optic Kerr effect for optical studies of magnetic nanostructures,” Appl. Phys. Lett. 85(3), 431–433 (2004).
[CrossRef]

Schmidt, O.G.

M. Fronk, B. Bräuer, J. Kortus, O.G. Schmidt, D.R.T. Zahn, and G. Salvan, “Determination of the Voigt constant of phthalocyanines by magneto-optical Kerr-effect spectroscopy,” Phys. Rev. B 79, 235305 (2009).

Schulze, S.

W. Li, M. Fronk, H. Kupfer, S. Schulze, M. Hietschold, D. R. T. Zahn, and G. Salvan, “Aging of rubrene layers in Ni/rubrene heterostructures studied by magneto-optical Kerr effect spectroscopy,” J. Am. Chem. Soc. 132(16), 5687–5692 (2010).
[CrossRef] [PubMed]

Someya, T.

V. C. Sundar, J. Zaumseil, V. Podzorov, E. Menard, R. L. Willett, T. Someya, M. E. Gershenson, and J. A. Rogers, “Elastomeric transistor stamps: reversible probing of charge transport in organic crystals,” Science 303(5664), 1644–1646 (2004).
[CrossRef] [PubMed]

Sundar, V. C.

V. C. Sundar, J. Zaumseil, V. Podzorov, E. Menard, R. L. Willett, T. Someya, M. E. Gershenson, and J. A. Rogers, “Elastomeric transistor stamps: reversible probing of charge transport in organic crystals,” Science 303(5664), 1644–1646 (2004).
[CrossRef] [PubMed]

Suzuki, Y.

T. Kitaguchi, T. Katayama, Y. Suzuki, N. Tsukane, and N. Koshizuka, “Organic dyes/co hybrid double layered film,” Jpn. J. Appl. Phys. 30(12A), 3377–3380 (1991).
[CrossRef]

Taliani, C.

V. A. Dediu, L. E. Hueso, I. Bergenti, and C. Taliani, “Spin routes in organic semiconductors,” Nat. Mater. 8(9), 707–716 (2009).
[CrossRef] [PubMed]

Toney, M. F.

G. R. Harp, D. Weller, T. A. Rabedeau, R. F. C. Farrow, and M. F. Toney, “Magneto-optical Kerr spectroscopy of a new chemically ordered alloy: Co3Pt,” Phys. Rev. Lett. 71(15), 2493–2496 (1993).
[CrossRef] [PubMed]

Tsukane, N.

T. Kitaguchi, T. Katayama, Y. Suzuki, N. Tsukane, and N. Koshizuka, “Organic dyes/co hybrid double layered film,” Jpn. J. Appl. Phys. 30(12A), 3377–3380 (1991).
[CrossRef]

Visnovsky, S.

S. Visnovsky, K. Postava, and T. Yamaguchi, “Magneto-optic polar Kerr and Faraday effects in periodic multilayers,” Opt. Express 9(3), 158–171 (2001).
[CrossRef] [PubMed]

J. Ferré, P. Meyer, M. Nyvlt, S. Visnovsky, and D. Renard, “Magnetooptic depth sensitivity in a simple ultrathin film structure,” J. Magn. Magn. Mater. 165(1–3), 92–95 (1997).
[CrossRef]

Wahl, M.

Th. Herrmann, K. Lüdge, W. Richter, K. G. Georgarakis, P. Poulopoulos, R. Nünthel, J. Lindner, M. Wahl, and N. Esser, “Optical anisotropy and magneto-optical properties of Ni on preoxidized Cu(110),” Phys. Rev. B 73, 134408 (2006).

Wan, A.

J. Hwang, A. Wan, and A. Kahn, “Energetics of metal–organic interfaces: New experiments and assessment of the field,” Mater. Sci. Eng. 4(1–2), 1–31 (2009).
[CrossRef]

Weller, D.

G. R. Harp, D. Weller, T. A. Rabedeau, R. F. C. Farrow, and M. F. Toney, “Magneto-optical Kerr spectroscopy of a new chemically ordered alloy: Co3Pt,” Phys. Rev. Lett. 71(15), 2493–2496 (1993).
[CrossRef] [PubMed]

Willett, R. L.

V. C. Sundar, J. Zaumseil, V. Podzorov, E. Menard, R. L. Willett, T. Someya, M. E. Gershenson, and J. A. Rogers, “Elastomeric transistor stamps: reversible probing of charge transport in organic crystals,” Science 303(5664), 1644–1646 (2004).
[CrossRef] [PubMed]

Witte, G.

D. Käfer and G. Witte, “Growth of crystalline rubrene films with enhanced stability,” Phys. Chem. Chem. Phys. 7(15), 2850–2853 (2005).
[CrossRef] [PubMed]

Yamaguchi, T.

Yaney, D.

O. Hellwig, J. K. Bosworth, E. Dobisz, D. Kercher, T. Hauet, G. Zeltzer, J. D. Risner-Jamtgaard, D. Yaney, and R. Ruiz, “Bit patterned media based on block copolymer directed assembly with narrow magnetic switching field distribution,” Appl. Phys. Lett. 96, 052511 (2010).

Zahn, D. R. T.

W. Li, M. Fronk, H. Kupfer, S. Schulze, M. Hietschold, D. R. T. Zahn, and G. Salvan, “Aging of rubrene layers in Ni/rubrene heterostructures studied by magneto-optical Kerr effect spectroscopy,” J. Am. Chem. Soc. 132(16), 5687–5692 (2010).
[CrossRef] [PubMed]

B. Bräuer, M. Fronk, D. Lehmann, D. R. T. Zahn, and G. Salvan, “Magneto-optical Kerr effect spectroscopy--a sensitive tool for investigating the molecular orientation in organic semiconductor films,” J. Phys. Chem. B 113(45), 14957–14961 (2009).
[CrossRef] [PubMed]

Zahn, D.R.T.

M. Fronk, B. Bräuer, J. Kortus, O.G. Schmidt, D.R.T. Zahn, and G. Salvan, “Determination of the Voigt constant of phthalocyanines by magneto-optical Kerr-effect spectroscopy,” Phys. Rev. B 79, 235305 (2009).

Zaumseil, J.

V. C. Sundar, J. Zaumseil, V. Podzorov, E. Menard, R. L. Willett, T. Someya, M. E. Gershenson, and J. A. Rogers, “Elastomeric transistor stamps: reversible probing of charge transport in organic crystals,” Science 303(5664), 1644–1646 (2004).
[CrossRef] [PubMed]

Zeltzer, G.

O. Hellwig, J. K. Bosworth, E. Dobisz, D. Kercher, T. Hauet, G. Zeltzer, J. D. Risner-Jamtgaard, D. Yaney, and R. Ruiz, “Bit patterned media based on block copolymer directed assembly with narrow magnetic switching field distribution,” Appl. Phys. Lett. 96, 052511 (2010).

Životský, O.

K. Postava, D. Hrabovský, O. Životský, J. Pištora, N. Dix, R. Muralidharan, J. M. Caicedo, F. Sánchez, and J. Fontcuberta, “Magneto-optic material selectivity in self-assembled BiFeO3–CoFe2O4 biferroic nanostructures,” J. Appl. Phys. 105, 07C124 (2009).

Appl. Phys. Lett. (2)

N. Qureshi, H. Schmidt, and A. R. Hawkins, “Cavity enhancement of the magneto-optic Kerr effect for optical studies of magnetic nanostructures,” Appl. Phys. Lett. 85(3), 431–433 (2004).
[CrossRef]

O. Hellwig, J. K. Bosworth, E. Dobisz, D. Kercher, T. Hauet, G. Zeltzer, J. D. Risner-Jamtgaard, D. Yaney, and R. Ruiz, “Bit patterned media based on block copolymer directed assembly with narrow magnetic switching field distribution,” Appl. Phys. Lett. 96, 052511 (2010).

J. Am. Chem. Soc. (1)

W. Li, M. Fronk, H. Kupfer, S. Schulze, M. Hietschold, D. R. T. Zahn, and G. Salvan, “Aging of rubrene layers in Ni/rubrene heterostructures studied by magneto-optical Kerr effect spectroscopy,” J. Am. Chem. Soc. 132(16), 5687–5692 (2010).
[CrossRef] [PubMed]

J. Appl. Phys. (1)

K. Postava, D. Hrabovský, O. Životský, J. Pištora, N. Dix, R. Muralidharan, J. M. Caicedo, F. Sánchez, and J. Fontcuberta, “Magneto-optic material selectivity in self-assembled BiFeO3–CoFe2O4 biferroic nanostructures,” J. Appl. Phys. 105, 07C124 (2009).

J. Magn. Magn. Mater. (1)

J. Ferré, P. Meyer, M. Nyvlt, S. Visnovsky, and D. Renard, “Magnetooptic depth sensitivity in a simple ultrathin film structure,” J. Magn. Magn. Mater. 165(1–3), 92–95 (1997).
[CrossRef]

J. Phys. Chem. B (1)

B. Bräuer, M. Fronk, D. Lehmann, D. R. T. Zahn, and G. Salvan, “Magneto-optical Kerr effect spectroscopy--a sensitive tool for investigating the molecular orientation in organic semiconductor films,” J. Phys. Chem. B 113(45), 14957–14961 (2009).
[CrossRef] [PubMed]

J. Phys. Chem. C (1)

K. Ishii and K. Ozawa, “Local-field-induced effective magnetic hysteresis of molecular magneto-optical effects in the visible region at room temperature: phthalocyanine thin films on ferromagnetic inorganic substrates,” J. Phys. Chem. C 113(43), 18897–18901 (2009).
[CrossRef]

Jpn. J. Appl. Phys. (1)

T. Kitaguchi, T. Katayama, Y. Suzuki, N. Tsukane, and N. Koshizuka, “Organic dyes/co hybrid double layered film,” Jpn. J. Appl. Phys. 30(12A), 3377–3380 (1991).
[CrossRef]

Mater. Sci. Eng. (1)

J. Hwang, A. Wan, and A. Kahn, “Energetics of metal–organic interfaces: New experiments and assessment of the field,” Mater. Sci. Eng. 4(1–2), 1–31 (2009).
[CrossRef]

Nano Today (1)

G. C. Papaefthymiou, “Nanoparticle magnetism,” Nano Today 4(5), 438–447 (2009).
[CrossRef]

Nat. Mater. (1)

V. A. Dediu, L. E. Hueso, I. Bergenti, and C. Taliani, “Spin routes in organic semiconductors,” Nat. Mater. 8(9), 707–716 (2009).
[CrossRef] [PubMed]

Opt. Express (2)

Phys. Chem. Chem. Phys. (1)

D. Käfer and G. Witte, “Growth of crystalline rubrene films with enhanced stability,” Phys. Chem. Chem. Phys. 7(15), 2850–2853 (2005).
[CrossRef] [PubMed]

Phys. Rev. B (2)

M. Fronk, B. Bräuer, J. Kortus, O.G. Schmidt, D.R.T. Zahn, and G. Salvan, “Determination of the Voigt constant of phthalocyanines by magneto-optical Kerr-effect spectroscopy,” Phys. Rev. B 79, 235305 (2009).

Th. Herrmann, K. Lüdge, W. Richter, K. G. Georgarakis, P. Poulopoulos, R. Nünthel, J. Lindner, M. Wahl, and N. Esser, “Optical anisotropy and magneto-optical properties of Ni on preoxidized Cu(110),” Phys. Rev. B 73, 134408 (2006).

Phys. Rev. Lett. (1)

G. R. Harp, D. Weller, T. A. Rabedeau, R. F. C. Farrow, and M. F. Toney, “Magneto-optical Kerr spectroscopy of a new chemically ordered alloy: Co3Pt,” Phys. Rev. Lett. 71(15), 2493–2496 (1993).
[CrossRef] [PubMed]

Science (1)

V. C. Sundar, J. Zaumseil, V. Podzorov, E. Menard, R. L. Willett, T. Someya, M. E. Gershenson, and J. A. Rogers, “Elastomeric transistor stamps: reversible probing of charge transport in organic crystals,” Science 303(5664), 1644–1646 (2004).
[CrossRef] [PubMed]

Surf. Sci. (1)

P. R. Ribič and G. Bratina, “Initial stages of growth of organic semiconductors on vicinal (0 0 0 1) sapphire surfaces,” Surf. Sci. 602(7), 1368–1375 (2008).
[CrossRef]

Other (1)

W. Li, “Inorganic samples with two magnetic phases,” in Magneto-Optical Kerr Effect Spectroscopy Study of Ferromagnetic Metal/Organic Heterostructures, PhD Thesis (Technische Universität Chemnitz, Chemnitz, 2010).

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Figures (6)

Fig. 1
Fig. 1

(a) AFM image and (b) SQUID (M-H) hysteresis loop of a Ni(14 nm)/rubrene(15 nm) bilayer measured in perpendicular geometry at room temperature.

Fig. 2
Fig. 2

(a-j) Hysteresis measured by polar MOKE at RT and at various photon energies. The left and right panels show the real part (rotation) and the imaginary part (ellipticity), respectively, of the complex MOKE signal.

Fig. 3
Fig. 3

MOKE spectra of the Ni(14 nm)/rubrene(15 nm) bilayer at different applied magnetic field strengths. (a) Spectra of the Kerr rotation. The inset shows the spectra near the zero-crossing point. (b) Magnetic field dependent Kerr ellipticity spectra. The inset shows the enlarged spectral range from 2.4 eV to 3.75 eV.

Fig. 4
Fig. 4

Complex MOKE rotation spectra of a Ni(14 nm)/rubrene(15 nm) bilayer recorded at 662.7 mT (line plus squares) compared to the spectrum recorded in remanence (line plus circles, enlarged by 12 times) and to the calculated spectra of component A (bold red line) and component B (thin blue line). Figure (a) displays the real part and figure (b) shows the imaginary part of the complex Kerr signal.

Fig. 5
Fig. 5

Complex Kerr rotation spectra for the magnetic field strength of (a) 6.66 mT, (b) 19.99 mT, (c) 136.03 mT, (d) 162.91 mT, (e) 209.13 mT, and (f) 662.67 mT. The symbols correspond to the experimental data and the solid lines to the simulated spectra. Blue and red represent the real and imaginary parts, respectively.

Fig. 6
Fig. 6

(a) AFM image of a Ni(14 nm)/rubrene(15 nm) bilayer for which rubrene was deposited with a rate of 10 nm/min. (b) The MOKE spectra at 350 mT of the two Ni(14 nm)/rubrene(15 nm) bilayers for which rubrene were deposited with 10 nm/min and 0.1 nm/min. The MOKE spectra of components A and B are also plotted for comparison.

Tables (1)

Tables Icon

Table 1 Weighting coefficients used for simulating the experimental MOKE spectra shown in Fig. 5

Equations (3)

Equations on this page are rendered with MathJax. Learn more.

θ(ω,H)=a θ A (ω,H)+b θ B (ω,H)
θ B (ω,H)=H θ BI (ω)
θ(ω,126.03mT)= θ A (ω, H s )+126.03 θ BI (ω)

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