Abstract

Mg1-yCay (0.03y0.17) alloy thin films covered with thin Pd were hydrogenated using 4% H2 in Ar under atmospheric pressure at room temperature. The complex dielectric functions (ε=ε1+iε2) in the range of 0.75 to 5.0eV of these hydrides were evaluated with spectroscopic ellipsometry. The imaginary part of the dielectric function ε2 was composed of one Drude and three Lorentz oscillator terms whose peak positions were about 1.2eV (L1), 2.8eV (L2), and 5.2eV (L3). The L3 term observed in all hydrides is attributed to optical absorption of MgH2 with Eg=5.16eV. The Drude term, which may be due to unhydrogenated Mg-metal, was observed in the hydrides with a low Ca composition y of less than 0.04. The L1 term was observed in the hydrides with a Ca composition of more than 0.05, while the L2 term was observed for more than 0.11. These L1 and L2 terms were estimated from a variation with hydrogenation of ellipsometric angle Ψ which is due to optical absorption of CaH2-α (L1) and MgCaH3.72 (L2).

© 2011 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. T. J. Richardson, J. L. Slack, R. D. Armitage, R. Kostecki, B. Farangis, and M. D. Rubin, “Switchable mirrors based on nickel–magnesium films,” Appl. Phys. Lett. 78, 3047–3049 (2001).
    [CrossRef]
  2. B. Farangis, P. Nachimuthu, T. J. Richardson, J. L. Slack, R. C. C. Perera, E. M. Gullikson, D. W. Lindle, and M. Rubin, “In situ x-ray-absorption spectroscopy study of hydrogen absorption by nickel-magnesium thin films,” Phys. Rev. B 67, 085106 (2003).
    [CrossRef]
  3. D. M. Borsa, R. Gremaud, A. Baldi, H. Schreuders, J. H. Rector, B. Kooi, P. Vermeulen, P. H. L. Notten, B. Dam, and R. Griessen, “Structural, optical, and electrical properties of MgyTi1-yHx thin films,” Phys. Rev. B 75, 205408 (2007).
    [CrossRef]
  4. K. Yoshimura, Y. Yamada, and M. Okada, “Optical switching of Mg-rich Mg-Ni alloy thin films,” Appl. Phys. Lett. 81, 4709–4711 (2002).
    [CrossRef]
  5. K. Yoshimura, S. Bao, Y. Yamada, and M. Okada, “Optical switching property of Pd-capped Mg-Ni alloy thin films prepared by magnetron sputtering,” Vacuum 80, 684–687 (2006).
    [CrossRef]
  6. S. Bao, K. Tajima, Y. Yamada, M. Okada, and K. Yoshimura, “Color-neutral switchable mirrors based on magnesium-titanium thin films,” Appl. Phys. A 87, 621–624 (2007).
    [CrossRef]
  7. S. Bao, K. Tajima, Y. Yamada, M. Okada, and K. Yoshimura, “Magnesium-titanium alloy thin-film switchable mirrors,” Sol. Energy Mater. Sol. Cells 92, 224–227 (2008).
    [CrossRef]
  8. S. Bao, Y. Yamada, K. Tajima, M. Okada, and K. Yoshimura, “New switchable mirror based on magnesium-niobium thin film,” Jpn. J. Appl. Phys. 46, L13–L15 (2007).
    [CrossRef]
  9. Y. Yamada, S. Bao, K. Tajima, M. Okada, and K. Yoshimura, “Optical properties of switchable mirrors based on magnesium-calcium alloy thin films,” Appl. Phys. Lett. 94, 191910 (2009).
    [CrossRef]
  10. K. von Rottkay, M. Rubin, and P. A. Duine, “Refractive index changes of Pd-coated magnesium lanthanide switchable mirrors upon hydrogen insertion,” J. Appl. Phys. 85, 408–413(1999).
    [CrossRef]
  11. J. Isidorsson, I. A. M. E. Giebels, H. Arwin, and R. Griessen, “Optical properties of MgH2 measured in situ by ellipsometry and spectrophotometry,” Phys. Rev. B 68, 115112 (2003).
    [CrossRef]
  12. R. Jansson, S. Zangooie, H. Arwin, and K. Järrendahl, “Characterization of 3C-SiC by spectroscopic ellipsometry,” Phys. Status Solidi B 218, R1–R2 (2000).
    [CrossRef]
  13. G. Krasko, Metal-Hydrogen Systems (Pergamon, 1982).
  14. Y. Yamada, S. Bao, K. Tajima, M. Okada, M. Tazawa, A. Roos, and K. Yoshimura, “In situ spectroscopic ellipsometry study of the hydrogenation process of switchable mirrors based on magnesium-nickel alloy thin films,” J. Appl. Phys. 107, 043517 (2010).
    [CrossRef]
  15. T. B. Massalski, Binary Alloy Phase Diagrams (ASM International, 1992).
  16. W. Lohstroh, R. J. Westerwaal, B. Noheda, S. Enache, I. A. M. E. Giebels, B. Dam, and R. Griessen, “Self-organized layered hydrogenation in black Mg2NiHx switchable mirrors,” Phys. Rev. Lett. 93, 197404 (2004).
    [CrossRef] [PubMed]
  17. W. Lohstroh, R. J. Westerwaal, J. L. M. van Mechelen, C. Chacon, E. Johansson, B. Dam, and R. Griessen, “Structural and optical properties of Mg2NiHx switchable mirrors upon hydrogen loading,” Phys. Rev. B 70, 165411 (2004).
    [CrossRef]
  18. K. Nomura, Y. Ishido, and S. Ono, “Newly synthesized metal hydride MgCaH3.72,” Yogyo-Kyokai-Shi 86, 67–72, in Japanese (1978).
  19. R. W. Curtis and P. Chiotti, “Thermodynamic properties of calcium hydride,” J. Phys. Chem. 67, 1061–1065 (1963).
    [CrossRef]

2010 (1)

Y. Yamada, S. Bao, K. Tajima, M. Okada, M. Tazawa, A. Roos, and K. Yoshimura, “In situ spectroscopic ellipsometry study of the hydrogenation process of switchable mirrors based on magnesium-nickel alloy thin films,” J. Appl. Phys. 107, 043517 (2010).
[CrossRef]

2009 (1)

Y. Yamada, S. Bao, K. Tajima, M. Okada, and K. Yoshimura, “Optical properties of switchable mirrors based on magnesium-calcium alloy thin films,” Appl. Phys. Lett. 94, 191910 (2009).
[CrossRef]

2008 (1)

S. Bao, K. Tajima, Y. Yamada, M. Okada, and K. Yoshimura, “Magnesium-titanium alloy thin-film switchable mirrors,” Sol. Energy Mater. Sol. Cells 92, 224–227 (2008).
[CrossRef]

2007 (3)

S. Bao, Y. Yamada, K. Tajima, M. Okada, and K. Yoshimura, “New switchable mirror based on magnesium-niobium thin film,” Jpn. J. Appl. Phys. 46, L13–L15 (2007).
[CrossRef]

S. Bao, K. Tajima, Y. Yamada, M. Okada, and K. Yoshimura, “Color-neutral switchable mirrors based on magnesium-titanium thin films,” Appl. Phys. A 87, 621–624 (2007).
[CrossRef]

D. M. Borsa, R. Gremaud, A. Baldi, H. Schreuders, J. H. Rector, B. Kooi, P. Vermeulen, P. H. L. Notten, B. Dam, and R. Griessen, “Structural, optical, and electrical properties of MgyTi1-yHx thin films,” Phys. Rev. B 75, 205408 (2007).
[CrossRef]

2006 (1)

K. Yoshimura, S. Bao, Y. Yamada, and M. Okada, “Optical switching property of Pd-capped Mg-Ni alloy thin films prepared by magnetron sputtering,” Vacuum 80, 684–687 (2006).
[CrossRef]

2004 (2)

W. Lohstroh, R. J. Westerwaal, B. Noheda, S. Enache, I. A. M. E. Giebels, B. Dam, and R. Griessen, “Self-organized layered hydrogenation in black Mg2NiHx switchable mirrors,” Phys. Rev. Lett. 93, 197404 (2004).
[CrossRef] [PubMed]

W. Lohstroh, R. J. Westerwaal, J. L. M. van Mechelen, C. Chacon, E. Johansson, B. Dam, and R. Griessen, “Structural and optical properties of Mg2NiHx switchable mirrors upon hydrogen loading,” Phys. Rev. B 70, 165411 (2004).
[CrossRef]

2003 (2)

J. Isidorsson, I. A. M. E. Giebels, H. Arwin, and R. Griessen, “Optical properties of MgH2 measured in situ by ellipsometry and spectrophotometry,” Phys. Rev. B 68, 115112 (2003).
[CrossRef]

B. Farangis, P. Nachimuthu, T. J. Richardson, J. L. Slack, R. C. C. Perera, E. M. Gullikson, D. W. Lindle, and M. Rubin, “In situ x-ray-absorption spectroscopy study of hydrogen absorption by nickel-magnesium thin films,” Phys. Rev. B 67, 085106 (2003).
[CrossRef]

2002 (1)

K. Yoshimura, Y. Yamada, and M. Okada, “Optical switching of Mg-rich Mg-Ni alloy thin films,” Appl. Phys. Lett. 81, 4709–4711 (2002).
[CrossRef]

2001 (1)

T. J. Richardson, J. L. Slack, R. D. Armitage, R. Kostecki, B. Farangis, and M. D. Rubin, “Switchable mirrors based on nickel–magnesium films,” Appl. Phys. Lett. 78, 3047–3049 (2001).
[CrossRef]

2000 (1)

R. Jansson, S. Zangooie, H. Arwin, and K. Järrendahl, “Characterization of 3C-SiC by spectroscopic ellipsometry,” Phys. Status Solidi B 218, R1–R2 (2000).
[CrossRef]

1999 (1)

K. von Rottkay, M. Rubin, and P. A. Duine, “Refractive index changes of Pd-coated magnesium lanthanide switchable mirrors upon hydrogen insertion,” J. Appl. Phys. 85, 408–413(1999).
[CrossRef]

1992 (1)

T. B. Massalski, Binary Alloy Phase Diagrams (ASM International, 1992).

1982 (1)

G. Krasko, Metal-Hydrogen Systems (Pergamon, 1982).

1978 (1)

K. Nomura, Y. Ishido, and S. Ono, “Newly synthesized metal hydride MgCaH3.72,” Yogyo-Kyokai-Shi 86, 67–72, in Japanese (1978).

1963 (1)

R. W. Curtis and P. Chiotti, “Thermodynamic properties of calcium hydride,” J. Phys. Chem. 67, 1061–1065 (1963).
[CrossRef]

Armitage, R. D.

T. J. Richardson, J. L. Slack, R. D. Armitage, R. Kostecki, B. Farangis, and M. D. Rubin, “Switchable mirrors based on nickel–magnesium films,” Appl. Phys. Lett. 78, 3047–3049 (2001).
[CrossRef]

Arwin, H.

J. Isidorsson, I. A. M. E. Giebels, H. Arwin, and R. Griessen, “Optical properties of MgH2 measured in situ by ellipsometry and spectrophotometry,” Phys. Rev. B 68, 115112 (2003).
[CrossRef]

R. Jansson, S. Zangooie, H. Arwin, and K. Järrendahl, “Characterization of 3C-SiC by spectroscopic ellipsometry,” Phys. Status Solidi B 218, R1–R2 (2000).
[CrossRef]

Baldi, A.

D. M. Borsa, R. Gremaud, A. Baldi, H. Schreuders, J. H. Rector, B. Kooi, P. Vermeulen, P. H. L. Notten, B. Dam, and R. Griessen, “Structural, optical, and electrical properties of MgyTi1-yHx thin films,” Phys. Rev. B 75, 205408 (2007).
[CrossRef]

Bao, S.

Y. Yamada, S. Bao, K. Tajima, M. Okada, M. Tazawa, A. Roos, and K. Yoshimura, “In situ spectroscopic ellipsometry study of the hydrogenation process of switchable mirrors based on magnesium-nickel alloy thin films,” J. Appl. Phys. 107, 043517 (2010).
[CrossRef]

Y. Yamada, S. Bao, K. Tajima, M. Okada, and K. Yoshimura, “Optical properties of switchable mirrors based on magnesium-calcium alloy thin films,” Appl. Phys. Lett. 94, 191910 (2009).
[CrossRef]

S. Bao, K. Tajima, Y. Yamada, M. Okada, and K. Yoshimura, “Magnesium-titanium alloy thin-film switchable mirrors,” Sol. Energy Mater. Sol. Cells 92, 224–227 (2008).
[CrossRef]

S. Bao, Y. Yamada, K. Tajima, M. Okada, and K. Yoshimura, “New switchable mirror based on magnesium-niobium thin film,” Jpn. J. Appl. Phys. 46, L13–L15 (2007).
[CrossRef]

S. Bao, K. Tajima, Y. Yamada, M. Okada, and K. Yoshimura, “Color-neutral switchable mirrors based on magnesium-titanium thin films,” Appl. Phys. A 87, 621–624 (2007).
[CrossRef]

K. Yoshimura, S. Bao, Y. Yamada, and M. Okada, “Optical switching property of Pd-capped Mg-Ni alloy thin films prepared by magnetron sputtering,” Vacuum 80, 684–687 (2006).
[CrossRef]

Borsa, D. M.

D. M. Borsa, R. Gremaud, A. Baldi, H. Schreuders, J. H. Rector, B. Kooi, P. Vermeulen, P. H. L. Notten, B. Dam, and R. Griessen, “Structural, optical, and electrical properties of MgyTi1-yHx thin films,” Phys. Rev. B 75, 205408 (2007).
[CrossRef]

Chacon, C.

W. Lohstroh, R. J. Westerwaal, J. L. M. van Mechelen, C. Chacon, E. Johansson, B. Dam, and R. Griessen, “Structural and optical properties of Mg2NiHx switchable mirrors upon hydrogen loading,” Phys. Rev. B 70, 165411 (2004).
[CrossRef]

Chiotti, P.

R. W. Curtis and P. Chiotti, “Thermodynamic properties of calcium hydride,” J. Phys. Chem. 67, 1061–1065 (1963).
[CrossRef]

Curtis, R. W.

R. W. Curtis and P. Chiotti, “Thermodynamic properties of calcium hydride,” J. Phys. Chem. 67, 1061–1065 (1963).
[CrossRef]

Dam, B.

D. M. Borsa, R. Gremaud, A. Baldi, H. Schreuders, J. H. Rector, B. Kooi, P. Vermeulen, P. H. L. Notten, B. Dam, and R. Griessen, “Structural, optical, and electrical properties of MgyTi1-yHx thin films,” Phys. Rev. B 75, 205408 (2007).
[CrossRef]

W. Lohstroh, R. J. Westerwaal, J. L. M. van Mechelen, C. Chacon, E. Johansson, B. Dam, and R. Griessen, “Structural and optical properties of Mg2NiHx switchable mirrors upon hydrogen loading,” Phys. Rev. B 70, 165411 (2004).
[CrossRef]

W. Lohstroh, R. J. Westerwaal, B. Noheda, S. Enache, I. A. M. E. Giebels, B. Dam, and R. Griessen, “Self-organized layered hydrogenation in black Mg2NiHx switchable mirrors,” Phys. Rev. Lett. 93, 197404 (2004).
[CrossRef] [PubMed]

Duine, P. A.

K. von Rottkay, M. Rubin, and P. A. Duine, “Refractive index changes of Pd-coated magnesium lanthanide switchable mirrors upon hydrogen insertion,” J. Appl. Phys. 85, 408–413(1999).
[CrossRef]

Enache, S.

W. Lohstroh, R. J. Westerwaal, B. Noheda, S. Enache, I. A. M. E. Giebels, B. Dam, and R. Griessen, “Self-organized layered hydrogenation in black Mg2NiHx switchable mirrors,” Phys. Rev. Lett. 93, 197404 (2004).
[CrossRef] [PubMed]

Farangis, B.

B. Farangis, P. Nachimuthu, T. J. Richardson, J. L. Slack, R. C. C. Perera, E. M. Gullikson, D. W. Lindle, and M. Rubin, “In situ x-ray-absorption spectroscopy study of hydrogen absorption by nickel-magnesium thin films,” Phys. Rev. B 67, 085106 (2003).
[CrossRef]

T. J. Richardson, J. L. Slack, R. D. Armitage, R. Kostecki, B. Farangis, and M. D. Rubin, “Switchable mirrors based on nickel–magnesium films,” Appl. Phys. Lett. 78, 3047–3049 (2001).
[CrossRef]

Giebels, I. A. M. E.

W. Lohstroh, R. J. Westerwaal, B. Noheda, S. Enache, I. A. M. E. Giebels, B. Dam, and R. Griessen, “Self-organized layered hydrogenation in black Mg2NiHx switchable mirrors,” Phys. Rev. Lett. 93, 197404 (2004).
[CrossRef] [PubMed]

J. Isidorsson, I. A. M. E. Giebels, H. Arwin, and R. Griessen, “Optical properties of MgH2 measured in situ by ellipsometry and spectrophotometry,” Phys. Rev. B 68, 115112 (2003).
[CrossRef]

Gremaud, R.

D. M. Borsa, R. Gremaud, A. Baldi, H. Schreuders, J. H. Rector, B. Kooi, P. Vermeulen, P. H. L. Notten, B. Dam, and R. Griessen, “Structural, optical, and electrical properties of MgyTi1-yHx thin films,” Phys. Rev. B 75, 205408 (2007).
[CrossRef]

Griessen, R.

D. M. Borsa, R. Gremaud, A. Baldi, H. Schreuders, J. H. Rector, B. Kooi, P. Vermeulen, P. H. L. Notten, B. Dam, and R. Griessen, “Structural, optical, and electrical properties of MgyTi1-yHx thin films,” Phys. Rev. B 75, 205408 (2007).
[CrossRef]

W. Lohstroh, R. J. Westerwaal, B. Noheda, S. Enache, I. A. M. E. Giebels, B. Dam, and R. Griessen, “Self-organized layered hydrogenation in black Mg2NiHx switchable mirrors,” Phys. Rev. Lett. 93, 197404 (2004).
[CrossRef] [PubMed]

W. Lohstroh, R. J. Westerwaal, J. L. M. van Mechelen, C. Chacon, E. Johansson, B. Dam, and R. Griessen, “Structural and optical properties of Mg2NiHx switchable mirrors upon hydrogen loading,” Phys. Rev. B 70, 165411 (2004).
[CrossRef]

J. Isidorsson, I. A. M. E. Giebels, H. Arwin, and R. Griessen, “Optical properties of MgH2 measured in situ by ellipsometry and spectrophotometry,” Phys. Rev. B 68, 115112 (2003).
[CrossRef]

Gullikson, E. M.

B. Farangis, P. Nachimuthu, T. J. Richardson, J. L. Slack, R. C. C. Perera, E. M. Gullikson, D. W. Lindle, and M. Rubin, “In situ x-ray-absorption spectroscopy study of hydrogen absorption by nickel-magnesium thin films,” Phys. Rev. B 67, 085106 (2003).
[CrossRef]

Ishido, Y.

K. Nomura, Y. Ishido, and S. Ono, “Newly synthesized metal hydride MgCaH3.72,” Yogyo-Kyokai-Shi 86, 67–72, in Japanese (1978).

Isidorsson, J.

J. Isidorsson, I. A. M. E. Giebels, H. Arwin, and R. Griessen, “Optical properties of MgH2 measured in situ by ellipsometry and spectrophotometry,” Phys. Rev. B 68, 115112 (2003).
[CrossRef]

Jansson, R.

R. Jansson, S. Zangooie, H. Arwin, and K. Järrendahl, “Characterization of 3C-SiC by spectroscopic ellipsometry,” Phys. Status Solidi B 218, R1–R2 (2000).
[CrossRef]

Järrendahl, K.

R. Jansson, S. Zangooie, H. Arwin, and K. Järrendahl, “Characterization of 3C-SiC by spectroscopic ellipsometry,” Phys. Status Solidi B 218, R1–R2 (2000).
[CrossRef]

Johansson, E.

W. Lohstroh, R. J. Westerwaal, J. L. M. van Mechelen, C. Chacon, E. Johansson, B. Dam, and R. Griessen, “Structural and optical properties of Mg2NiHx switchable mirrors upon hydrogen loading,” Phys. Rev. B 70, 165411 (2004).
[CrossRef]

Kooi, B.

D. M. Borsa, R. Gremaud, A. Baldi, H. Schreuders, J. H. Rector, B. Kooi, P. Vermeulen, P. H. L. Notten, B. Dam, and R. Griessen, “Structural, optical, and electrical properties of MgyTi1-yHx thin films,” Phys. Rev. B 75, 205408 (2007).
[CrossRef]

Kostecki, R.

T. J. Richardson, J. L. Slack, R. D. Armitage, R. Kostecki, B. Farangis, and M. D. Rubin, “Switchable mirrors based on nickel–magnesium films,” Appl. Phys. Lett. 78, 3047–3049 (2001).
[CrossRef]

Krasko, G.

G. Krasko, Metal-Hydrogen Systems (Pergamon, 1982).

Lindle, D. W.

B. Farangis, P. Nachimuthu, T. J. Richardson, J. L. Slack, R. C. C. Perera, E. M. Gullikson, D. W. Lindle, and M. Rubin, “In situ x-ray-absorption spectroscopy study of hydrogen absorption by nickel-magnesium thin films,” Phys. Rev. B 67, 085106 (2003).
[CrossRef]

Lohstroh, W.

W. Lohstroh, R. J. Westerwaal, J. L. M. van Mechelen, C. Chacon, E. Johansson, B. Dam, and R. Griessen, “Structural and optical properties of Mg2NiHx switchable mirrors upon hydrogen loading,” Phys. Rev. B 70, 165411 (2004).
[CrossRef]

W. Lohstroh, R. J. Westerwaal, B. Noheda, S. Enache, I. A. M. E. Giebels, B. Dam, and R. Griessen, “Self-organized layered hydrogenation in black Mg2NiHx switchable mirrors,” Phys. Rev. Lett. 93, 197404 (2004).
[CrossRef] [PubMed]

Massalski, T. B.

T. B. Massalski, Binary Alloy Phase Diagrams (ASM International, 1992).

Nachimuthu, P.

B. Farangis, P. Nachimuthu, T. J. Richardson, J. L. Slack, R. C. C. Perera, E. M. Gullikson, D. W. Lindle, and M. Rubin, “In situ x-ray-absorption spectroscopy study of hydrogen absorption by nickel-magnesium thin films,” Phys. Rev. B 67, 085106 (2003).
[CrossRef]

Noheda, B.

W. Lohstroh, R. J. Westerwaal, B. Noheda, S. Enache, I. A. M. E. Giebels, B. Dam, and R. Griessen, “Self-organized layered hydrogenation in black Mg2NiHx switchable mirrors,” Phys. Rev. Lett. 93, 197404 (2004).
[CrossRef] [PubMed]

Nomura, K.

K. Nomura, Y. Ishido, and S. Ono, “Newly synthesized metal hydride MgCaH3.72,” Yogyo-Kyokai-Shi 86, 67–72, in Japanese (1978).

Notten, P. H. L.

D. M. Borsa, R. Gremaud, A. Baldi, H. Schreuders, J. H. Rector, B. Kooi, P. Vermeulen, P. H. L. Notten, B. Dam, and R. Griessen, “Structural, optical, and electrical properties of MgyTi1-yHx thin films,” Phys. Rev. B 75, 205408 (2007).
[CrossRef]

Okada, M.

Y. Yamada, S. Bao, K. Tajima, M. Okada, M. Tazawa, A. Roos, and K. Yoshimura, “In situ spectroscopic ellipsometry study of the hydrogenation process of switchable mirrors based on magnesium-nickel alloy thin films,” J. Appl. Phys. 107, 043517 (2010).
[CrossRef]

Y. Yamada, S. Bao, K. Tajima, M. Okada, and K. Yoshimura, “Optical properties of switchable mirrors based on magnesium-calcium alloy thin films,” Appl. Phys. Lett. 94, 191910 (2009).
[CrossRef]

S. Bao, K. Tajima, Y. Yamada, M. Okada, and K. Yoshimura, “Magnesium-titanium alloy thin-film switchable mirrors,” Sol. Energy Mater. Sol. Cells 92, 224–227 (2008).
[CrossRef]

S. Bao, Y. Yamada, K. Tajima, M. Okada, and K. Yoshimura, “New switchable mirror based on magnesium-niobium thin film,” Jpn. J. Appl. Phys. 46, L13–L15 (2007).
[CrossRef]

S. Bao, K. Tajima, Y. Yamada, M. Okada, and K. Yoshimura, “Color-neutral switchable mirrors based on magnesium-titanium thin films,” Appl. Phys. A 87, 621–624 (2007).
[CrossRef]

K. Yoshimura, S. Bao, Y. Yamada, and M. Okada, “Optical switching property of Pd-capped Mg-Ni alloy thin films prepared by magnetron sputtering,” Vacuum 80, 684–687 (2006).
[CrossRef]

K. Yoshimura, Y. Yamada, and M. Okada, “Optical switching of Mg-rich Mg-Ni alloy thin films,” Appl. Phys. Lett. 81, 4709–4711 (2002).
[CrossRef]

Ono, S.

K. Nomura, Y. Ishido, and S. Ono, “Newly synthesized metal hydride MgCaH3.72,” Yogyo-Kyokai-Shi 86, 67–72, in Japanese (1978).

Perera, R. C. C.

B. Farangis, P. Nachimuthu, T. J. Richardson, J. L. Slack, R. C. C. Perera, E. M. Gullikson, D. W. Lindle, and M. Rubin, “In situ x-ray-absorption spectroscopy study of hydrogen absorption by nickel-magnesium thin films,” Phys. Rev. B 67, 085106 (2003).
[CrossRef]

Rector, J. H.

D. M. Borsa, R. Gremaud, A. Baldi, H. Schreuders, J. H. Rector, B. Kooi, P. Vermeulen, P. H. L. Notten, B. Dam, and R. Griessen, “Structural, optical, and electrical properties of MgyTi1-yHx thin films,” Phys. Rev. B 75, 205408 (2007).
[CrossRef]

Richardson, T. J.

B. Farangis, P. Nachimuthu, T. J. Richardson, J. L. Slack, R. C. C. Perera, E. M. Gullikson, D. W. Lindle, and M. Rubin, “In situ x-ray-absorption spectroscopy study of hydrogen absorption by nickel-magnesium thin films,” Phys. Rev. B 67, 085106 (2003).
[CrossRef]

T. J. Richardson, J. L. Slack, R. D. Armitage, R. Kostecki, B. Farangis, and M. D. Rubin, “Switchable mirrors based on nickel–magnesium films,” Appl. Phys. Lett. 78, 3047–3049 (2001).
[CrossRef]

Roos, A.

Y. Yamada, S. Bao, K. Tajima, M. Okada, M. Tazawa, A. Roos, and K. Yoshimura, “In situ spectroscopic ellipsometry study of the hydrogenation process of switchable mirrors based on magnesium-nickel alloy thin films,” J. Appl. Phys. 107, 043517 (2010).
[CrossRef]

Rubin, M.

B. Farangis, P. Nachimuthu, T. J. Richardson, J. L. Slack, R. C. C. Perera, E. M. Gullikson, D. W. Lindle, and M. Rubin, “In situ x-ray-absorption spectroscopy study of hydrogen absorption by nickel-magnesium thin films,” Phys. Rev. B 67, 085106 (2003).
[CrossRef]

K. von Rottkay, M. Rubin, and P. A. Duine, “Refractive index changes of Pd-coated magnesium lanthanide switchable mirrors upon hydrogen insertion,” J. Appl. Phys. 85, 408–413(1999).
[CrossRef]

Rubin, M. D.

T. J. Richardson, J. L. Slack, R. D. Armitage, R. Kostecki, B. Farangis, and M. D. Rubin, “Switchable mirrors based on nickel–magnesium films,” Appl. Phys. Lett. 78, 3047–3049 (2001).
[CrossRef]

Schreuders, H.

D. M. Borsa, R. Gremaud, A. Baldi, H. Schreuders, J. H. Rector, B. Kooi, P. Vermeulen, P. H. L. Notten, B. Dam, and R. Griessen, “Structural, optical, and electrical properties of MgyTi1-yHx thin films,” Phys. Rev. B 75, 205408 (2007).
[CrossRef]

Slack, J. L.

B. Farangis, P. Nachimuthu, T. J. Richardson, J. L. Slack, R. C. C. Perera, E. M. Gullikson, D. W. Lindle, and M. Rubin, “In situ x-ray-absorption spectroscopy study of hydrogen absorption by nickel-magnesium thin films,” Phys. Rev. B 67, 085106 (2003).
[CrossRef]

T. J. Richardson, J. L. Slack, R. D. Armitage, R. Kostecki, B. Farangis, and M. D. Rubin, “Switchable mirrors based on nickel–magnesium films,” Appl. Phys. Lett. 78, 3047–3049 (2001).
[CrossRef]

Tajima, K.

Y. Yamada, S. Bao, K. Tajima, M. Okada, M. Tazawa, A. Roos, and K. Yoshimura, “In situ spectroscopic ellipsometry study of the hydrogenation process of switchable mirrors based on magnesium-nickel alloy thin films,” J. Appl. Phys. 107, 043517 (2010).
[CrossRef]

Y. Yamada, S. Bao, K. Tajima, M. Okada, and K. Yoshimura, “Optical properties of switchable mirrors based on magnesium-calcium alloy thin films,” Appl. Phys. Lett. 94, 191910 (2009).
[CrossRef]

S. Bao, K. Tajima, Y. Yamada, M. Okada, and K. Yoshimura, “Magnesium-titanium alloy thin-film switchable mirrors,” Sol. Energy Mater. Sol. Cells 92, 224–227 (2008).
[CrossRef]

S. Bao, Y. Yamada, K. Tajima, M. Okada, and K. Yoshimura, “New switchable mirror based on magnesium-niobium thin film,” Jpn. J. Appl. Phys. 46, L13–L15 (2007).
[CrossRef]

S. Bao, K. Tajima, Y. Yamada, M. Okada, and K. Yoshimura, “Color-neutral switchable mirrors based on magnesium-titanium thin films,” Appl. Phys. A 87, 621–624 (2007).
[CrossRef]

Tazawa, M.

Y. Yamada, S. Bao, K. Tajima, M. Okada, M. Tazawa, A. Roos, and K. Yoshimura, “In situ spectroscopic ellipsometry study of the hydrogenation process of switchable mirrors based on magnesium-nickel alloy thin films,” J. Appl. Phys. 107, 043517 (2010).
[CrossRef]

van Mechelen, J. L. M.

W. Lohstroh, R. J. Westerwaal, J. L. M. van Mechelen, C. Chacon, E. Johansson, B. Dam, and R. Griessen, “Structural and optical properties of Mg2NiHx switchable mirrors upon hydrogen loading,” Phys. Rev. B 70, 165411 (2004).
[CrossRef]

Vermeulen, P.

D. M. Borsa, R. Gremaud, A. Baldi, H. Schreuders, J. H. Rector, B. Kooi, P. Vermeulen, P. H. L. Notten, B. Dam, and R. Griessen, “Structural, optical, and electrical properties of MgyTi1-yHx thin films,” Phys. Rev. B 75, 205408 (2007).
[CrossRef]

von Rottkay, K.

K. von Rottkay, M. Rubin, and P. A. Duine, “Refractive index changes of Pd-coated magnesium lanthanide switchable mirrors upon hydrogen insertion,” J. Appl. Phys. 85, 408–413(1999).
[CrossRef]

Westerwaal, R. J.

W. Lohstroh, R. J. Westerwaal, B. Noheda, S. Enache, I. A. M. E. Giebels, B. Dam, and R. Griessen, “Self-organized layered hydrogenation in black Mg2NiHx switchable mirrors,” Phys. Rev. Lett. 93, 197404 (2004).
[CrossRef] [PubMed]

W. Lohstroh, R. J. Westerwaal, J. L. M. van Mechelen, C. Chacon, E. Johansson, B. Dam, and R. Griessen, “Structural and optical properties of Mg2NiHx switchable mirrors upon hydrogen loading,” Phys. Rev. B 70, 165411 (2004).
[CrossRef]

Yamada, Y.

Y. Yamada, S. Bao, K. Tajima, M. Okada, M. Tazawa, A. Roos, and K. Yoshimura, “In situ spectroscopic ellipsometry study of the hydrogenation process of switchable mirrors based on magnesium-nickel alloy thin films,” J. Appl. Phys. 107, 043517 (2010).
[CrossRef]

Y. Yamada, S. Bao, K. Tajima, M. Okada, and K. Yoshimura, “Optical properties of switchable mirrors based on magnesium-calcium alloy thin films,” Appl. Phys. Lett. 94, 191910 (2009).
[CrossRef]

S. Bao, K. Tajima, Y. Yamada, M. Okada, and K. Yoshimura, “Magnesium-titanium alloy thin-film switchable mirrors,” Sol. Energy Mater. Sol. Cells 92, 224–227 (2008).
[CrossRef]

S. Bao, Y. Yamada, K. Tajima, M. Okada, and K. Yoshimura, “New switchable mirror based on magnesium-niobium thin film,” Jpn. J. Appl. Phys. 46, L13–L15 (2007).
[CrossRef]

S. Bao, K. Tajima, Y. Yamada, M. Okada, and K. Yoshimura, “Color-neutral switchable mirrors based on magnesium-titanium thin films,” Appl. Phys. A 87, 621–624 (2007).
[CrossRef]

K. Yoshimura, S. Bao, Y. Yamada, and M. Okada, “Optical switching property of Pd-capped Mg-Ni alloy thin films prepared by magnetron sputtering,” Vacuum 80, 684–687 (2006).
[CrossRef]

K. Yoshimura, Y. Yamada, and M. Okada, “Optical switching of Mg-rich Mg-Ni alloy thin films,” Appl. Phys. Lett. 81, 4709–4711 (2002).
[CrossRef]

Yoshimura, K.

Y. Yamada, S. Bao, K. Tajima, M. Okada, M. Tazawa, A. Roos, and K. Yoshimura, “In situ spectroscopic ellipsometry study of the hydrogenation process of switchable mirrors based on magnesium-nickel alloy thin films,” J. Appl. Phys. 107, 043517 (2010).
[CrossRef]

Y. Yamada, S. Bao, K. Tajima, M. Okada, and K. Yoshimura, “Optical properties of switchable mirrors based on magnesium-calcium alloy thin films,” Appl. Phys. Lett. 94, 191910 (2009).
[CrossRef]

S. Bao, K. Tajima, Y. Yamada, M. Okada, and K. Yoshimura, “Magnesium-titanium alloy thin-film switchable mirrors,” Sol. Energy Mater. Sol. Cells 92, 224–227 (2008).
[CrossRef]

S. Bao, Y. Yamada, K. Tajima, M. Okada, and K. Yoshimura, “New switchable mirror based on magnesium-niobium thin film,” Jpn. J. Appl. Phys. 46, L13–L15 (2007).
[CrossRef]

S. Bao, K. Tajima, Y. Yamada, M. Okada, and K. Yoshimura, “Color-neutral switchable mirrors based on magnesium-titanium thin films,” Appl. Phys. A 87, 621–624 (2007).
[CrossRef]

K. Yoshimura, S. Bao, Y. Yamada, and M. Okada, “Optical switching property of Pd-capped Mg-Ni alloy thin films prepared by magnetron sputtering,” Vacuum 80, 684–687 (2006).
[CrossRef]

K. Yoshimura, Y. Yamada, and M. Okada, “Optical switching of Mg-rich Mg-Ni alloy thin films,” Appl. Phys. Lett. 81, 4709–4711 (2002).
[CrossRef]

Zangooie, S.

R. Jansson, S. Zangooie, H. Arwin, and K. Järrendahl, “Characterization of 3C-SiC by spectroscopic ellipsometry,” Phys. Status Solidi B 218, R1–R2 (2000).
[CrossRef]

Appl. Phys. A (1)

S. Bao, K. Tajima, Y. Yamada, M. Okada, and K. Yoshimura, “Color-neutral switchable mirrors based on magnesium-titanium thin films,” Appl. Phys. A 87, 621–624 (2007).
[CrossRef]

Appl. Phys. Lett. (3)

T. J. Richardson, J. L. Slack, R. D. Armitage, R. Kostecki, B. Farangis, and M. D. Rubin, “Switchable mirrors based on nickel–magnesium films,” Appl. Phys. Lett. 78, 3047–3049 (2001).
[CrossRef]

K. Yoshimura, Y. Yamada, and M. Okada, “Optical switching of Mg-rich Mg-Ni alloy thin films,” Appl. Phys. Lett. 81, 4709–4711 (2002).
[CrossRef]

Y. Yamada, S. Bao, K. Tajima, M. Okada, and K. Yoshimura, “Optical properties of switchable mirrors based on magnesium-calcium alloy thin films,” Appl. Phys. Lett. 94, 191910 (2009).
[CrossRef]

J. Appl. Phys. (2)

K. von Rottkay, M. Rubin, and P. A. Duine, “Refractive index changes of Pd-coated magnesium lanthanide switchable mirrors upon hydrogen insertion,” J. Appl. Phys. 85, 408–413(1999).
[CrossRef]

Y. Yamada, S. Bao, K. Tajima, M. Okada, M. Tazawa, A. Roos, and K. Yoshimura, “In situ spectroscopic ellipsometry study of the hydrogenation process of switchable mirrors based on magnesium-nickel alloy thin films,” J. Appl. Phys. 107, 043517 (2010).
[CrossRef]

J. Phys. Chem. (1)

R. W. Curtis and P. Chiotti, “Thermodynamic properties of calcium hydride,” J. Phys. Chem. 67, 1061–1065 (1963).
[CrossRef]

Jpn. J. Appl. Phys. (1)

S. Bao, Y. Yamada, K. Tajima, M. Okada, and K. Yoshimura, “New switchable mirror based on magnesium-niobium thin film,” Jpn. J. Appl. Phys. 46, L13–L15 (2007).
[CrossRef]

Phys. Rev. B (4)

W. Lohstroh, R. J. Westerwaal, J. L. M. van Mechelen, C. Chacon, E. Johansson, B. Dam, and R. Griessen, “Structural and optical properties of Mg2NiHx switchable mirrors upon hydrogen loading,” Phys. Rev. B 70, 165411 (2004).
[CrossRef]

J. Isidorsson, I. A. M. E. Giebels, H. Arwin, and R. Griessen, “Optical properties of MgH2 measured in situ by ellipsometry and spectrophotometry,” Phys. Rev. B 68, 115112 (2003).
[CrossRef]

B. Farangis, P. Nachimuthu, T. J. Richardson, J. L. Slack, R. C. C. Perera, E. M. Gullikson, D. W. Lindle, and M. Rubin, “In situ x-ray-absorption spectroscopy study of hydrogen absorption by nickel-magnesium thin films,” Phys. Rev. B 67, 085106 (2003).
[CrossRef]

D. M. Borsa, R. Gremaud, A. Baldi, H. Schreuders, J. H. Rector, B. Kooi, P. Vermeulen, P. H. L. Notten, B. Dam, and R. Griessen, “Structural, optical, and electrical properties of MgyTi1-yHx thin films,” Phys. Rev. B 75, 205408 (2007).
[CrossRef]

Phys. Rev. Lett. (1)

W. Lohstroh, R. J. Westerwaal, B. Noheda, S. Enache, I. A. M. E. Giebels, B. Dam, and R. Griessen, “Self-organized layered hydrogenation in black Mg2NiHx switchable mirrors,” Phys. Rev. Lett. 93, 197404 (2004).
[CrossRef] [PubMed]

Phys. Status Solidi B (1)

R. Jansson, S. Zangooie, H. Arwin, and K. Järrendahl, “Characterization of 3C-SiC by spectroscopic ellipsometry,” Phys. Status Solidi B 218, R1–R2 (2000).
[CrossRef]

Sol. Energy Mater. Sol. Cells (1)

S. Bao, K. Tajima, Y. Yamada, M. Okada, and K. Yoshimura, “Magnesium-titanium alloy thin-film switchable mirrors,” Sol. Energy Mater. Sol. Cells 92, 224–227 (2008).
[CrossRef]

Vacuum (1)

K. Yoshimura, S. Bao, Y. Yamada, and M. Okada, “Optical switching property of Pd-capped Mg-Ni alloy thin films prepared by magnetron sputtering,” Vacuum 80, 684–687 (2006).
[CrossRef]

Yogyo-Kyokai-Shi (1)

K. Nomura, Y. Ishido, and S. Ono, “Newly synthesized metal hydride MgCaH3.72,” Yogyo-Kyokai-Shi 86, 67–72, in Japanese (1978).

Other (2)

T. B. Massalski, Binary Alloy Phase Diagrams (ASM International, 1992).

G. Krasko, Metal-Hydrogen Systems (Pergamon, 1982).

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (6)

Fig. 1
Fig. 1

Mg–Ca alloy compositions evaluated by RBS as a function of the sputtering power ratio (Ca/Mg). Reasonable relationship between composition and power ratio was obtained. Inset, RBS experimental and the simulated data for a Mg 0.74 Ca 0.26 film covered with thin Pd on C substrate.

Fig. 2
Fig. 2

Experimental spectra of the ellipsometric angles (a) Ψ and (b) Δ for a Mg 0.94 Ca 0.06 film covered with thin Pd as a function of elapsed time of hydrogenation. These spectra were measured in the energy range of 0.75 to 5.0 eV using light with incident angle of 75 ° .

Fig. 3
Fig. 3

Experimental ellipsometric (a) Ψ and (b) Δ spectra of fully hydrogenated Mg 1 - y Ca y H x thin films covered with thin Pd ( y = 0.03 , 0.06, 0.08, 0.11, and 0.17) using light with incident angle of 75 ° .

Fig. 4
Fig. 4

Ellipsometric spectra of (a) Ψ, (b) Δ, and (c) optical transmittance T spectrum of fully hydrogenated Mg 0.94 Ca 0.06 film covered with thin Pd together with the corresponding fitted spectra. Ellipsometric spectra were measured using an incident angle of 55 ° and 75 ° for the energy range 0.75 to 5.0 eV . Inset of (a), structural model used to analyze ellipsometric and transmittance spectra.

Fig. 5
Fig. 5

Evaluated complex dielectric functions ε 1 and ε 2 of Mg 1 - y Ca y H x thin films with y = 0.03 , 0.06, 0.08, 0.11, and 0.17.

Fig. 6
Fig. 6

Experimental variations in the ellipsometric angle Ψ with hydrogenation at the photon energy of 1.00 eV as a function of elapsed time for Mg 1 - y Ca y H x thin films covered with thin Pd ( y = 0.03 , 0.06, 0.08, 0.11, and 0.17). In this figure, the time scale from 0 to 2.5 min is expanded to improve visibility of the variations in Ψ. Inset, magnified section of region A.

Tables (1)

Tables Icon

Table 1 Lorentz–Drude Parameters Obtained from Ellipsometric and Transmittance Data (see Fig. 4) for Mg 1 y Ca y H x Thin Films with y = 0.03 , 0.06, 0.08, 0.11, and 0.17 a

Equations (6)

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

r p r s = tan [ Ψ ( E ) ] · exp [ i Δ ( E ) ] ,
ε ( ω ) = ε 1 + i ε 2 = ε i = 1 M ω p , i 2 ω 2 + i ω / τ i + j = 1 N f j ω j 2 ω 2 i Γ j ω ,
metal - Mg H 2 hydrogen solid solution   Mg ,
Mg 2 Ca H 2 CaH 2 - α + 2 Mg ,
Mg + CaH 2 - α H 2 MgCaH 3.72 ,
hydrogen solid solution   Mg H 2 MgH 2 .

Metrics