Abstract

The temperature dependence of the Ni<sup>2+</sup> ion absorption-transition maxima has been studied in the magnetic host materials of KNi<sub>1-<i>x</i></sub>Mg<sub><i>x</i></sub>F<sub>3</sub>, RbFeF<sub>3</sub>, RbCoF<sub>3</sub>, RbMnF<sub>3</sub>, MnF<sub>2</sub>, and KMnF<sub>3</sub>. The behavior of the absorption transitions in these materials differs from the behavior due to purely thermal effects observed in the nonmagnetic hosts. Additional shifts, due to the exchange interactions responsible for the magnetic properties, are superimposed on the thermal shifts. In the pure-nickel salts, the departures from purely thermal behavior occur in the vicinity of the ordering temperature of the crystals. In KNi<sub>l-<i>x</i></sub>Mg<sub><i>x</i></sub>F<sub>3</sub> crystals, the departures are observed in materials of sufficient Ni<sup>2+</sup> concentration, below the Néel temperature of the pure material. In magnetic materials where the Ni<sup>2+</sup> ion is an impurity, the magnetically induced shifts in the nickel absorption bands are observed near the ordering temperature of the host crystal.

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  1. K. Knox, R. G. Shulman, and S. Sugano, Phys. Rev. 130, 512 (1963).
  2. W. W. Holloway, Jr. and M. Kestigian, Phys. Rev. Letters 15, 17 (1965).
  3. J. Ferguson, H. J. Guggenheim, and D. L. Wood, J. Chem. Phys. 40, 822 (1964); J. Ferguson and H. J. Guggenheim, J. Chem. Phys. 44, 1095 (1966).
  4. E. I. Golovenchits, A. G. Gurevich, and V. A. Sanina, Zh. Eksperim. i Teor. Fiz. Pis'ma v Redaktsiyu 3, 408 (1966) [Sov. Phys. JETP Letters 3, 266 (1966)].
  5. J. F. B. Hawkes, M. J. M. Leask, and J. H. M. Thornley, Phys. Letters 20, 457 (1966).
  6. W. W. Holloway, Jr. and M. Kestigian, J. Chem. Phys. 45, 639 (1966).
  7. U. Ganiel, M. Kestigian and S. Shtrikman, Phys. Letters 24A, 577 (1967); G. K. Wertheim, H. J. Guggenheim, H. J. Williams, and P. N. E. Buchanan, Phys. Rev. 158, 446 (1967).
  8. Landolt-Bornstein, Tabellen Magnetische und Elektrischen Eigenschaften 9-II (Springer, Berlin, 1963).
  9. W. W. Holloway, Jr. and M. Kestigian, J. Appl. Phys. 38, 1480 (1967).

Ferguson, J.

J. Ferguson, H. J. Guggenheim, and D. L. Wood, J. Chem. Phys. 40, 822 (1964); J. Ferguson and H. J. Guggenheim, J. Chem. Phys. 44, 1095 (1966).

Ganiel, U.

U. Ganiel, M. Kestigian and S. Shtrikman, Phys. Letters 24A, 577 (1967); G. K. Wertheim, H. J. Guggenheim, H. J. Williams, and P. N. E. Buchanan, Phys. Rev. 158, 446 (1967).

Golovenchits, E. I.

E. I. Golovenchits, A. G. Gurevich, and V. A. Sanina, Zh. Eksperim. i Teor. Fiz. Pis'ma v Redaktsiyu 3, 408 (1966) [Sov. Phys. JETP Letters 3, 266 (1966)].

Guggenheim, H. J.

J. Ferguson, H. J. Guggenheim, and D. L. Wood, J. Chem. Phys. 40, 822 (1964); J. Ferguson and H. J. Guggenheim, J. Chem. Phys. 44, 1095 (1966).

Gurevich, A. G.

E. I. Golovenchits, A. G. Gurevich, and V. A. Sanina, Zh. Eksperim. i Teor. Fiz. Pis'ma v Redaktsiyu 3, 408 (1966) [Sov. Phys. JETP Letters 3, 266 (1966)].

Hawkes, J. F. B.

J. F. B. Hawkes, M. J. M. Leask, and J. H. M. Thornley, Phys. Letters 20, 457 (1966).

Holloway, Jr., W. W.

W. W. Holloway, Jr. and M. Kestigian, J. Appl. Phys. 38, 1480 (1967).

W. W. Holloway, Jr. and M. Kestigian, J. Chem. Phys. 45, 639 (1966).

W. W. Holloway, Jr. and M. Kestigian, Phys. Rev. Letters 15, 17 (1965).

Kestigian, M.

W. W. Holloway, Jr. and M. Kestigian, Phys. Rev. Letters 15, 17 (1965).

W. W. Holloway, Jr. and M. Kestigian, J. Chem. Phys. 45, 639 (1966).

W. W. Holloway, Jr. and M. Kestigian, J. Appl. Phys. 38, 1480 (1967).

U. Ganiel, M. Kestigian and S. Shtrikman, Phys. Letters 24A, 577 (1967); G. K. Wertheim, H. J. Guggenheim, H. J. Williams, and P. N. E. Buchanan, Phys. Rev. 158, 446 (1967).

Knox, K.

K. Knox, R. G. Shulman, and S. Sugano, Phys. Rev. 130, 512 (1963).

Leask, M. J. M.

J. F. B. Hawkes, M. J. M. Leask, and J. H. M. Thornley, Phys. Letters 20, 457 (1966).

Sanina, V. A.

E. I. Golovenchits, A. G. Gurevich, and V. A. Sanina, Zh. Eksperim. i Teor. Fiz. Pis'ma v Redaktsiyu 3, 408 (1966) [Sov. Phys. JETP Letters 3, 266 (1966)].

Shtrikman, S.

U. Ganiel, M. Kestigian and S. Shtrikman, Phys. Letters 24A, 577 (1967); G. K. Wertheim, H. J. Guggenheim, H. J. Williams, and P. N. E. Buchanan, Phys. Rev. 158, 446 (1967).

Shulman, R. G.

K. Knox, R. G. Shulman, and S. Sugano, Phys. Rev. 130, 512 (1963).

Sugano, S.

K. Knox, R. G. Shulman, and S. Sugano, Phys. Rev. 130, 512 (1963).

Thornley, J. H. M.

J. F. B. Hawkes, M. J. M. Leask, and J. H. M. Thornley, Phys. Letters 20, 457 (1966).

Wood, D. L.

J. Ferguson, H. J. Guggenheim, and D. L. Wood, J. Chem. Phys. 40, 822 (1964); J. Ferguson and H. J. Guggenheim, J. Chem. Phys. 44, 1095 (1966).

Other

K. Knox, R. G. Shulman, and S. Sugano, Phys. Rev. 130, 512 (1963).

W. W. Holloway, Jr. and M. Kestigian, Phys. Rev. Letters 15, 17 (1965).

J. Ferguson, H. J. Guggenheim, and D. L. Wood, J. Chem. Phys. 40, 822 (1964); J. Ferguson and H. J. Guggenheim, J. Chem. Phys. 44, 1095 (1966).

E. I. Golovenchits, A. G. Gurevich, and V. A. Sanina, Zh. Eksperim. i Teor. Fiz. Pis'ma v Redaktsiyu 3, 408 (1966) [Sov. Phys. JETP Letters 3, 266 (1966)].

J. F. B. Hawkes, M. J. M. Leask, and J. H. M. Thornley, Phys. Letters 20, 457 (1966).

W. W. Holloway, Jr. and M. Kestigian, J. Chem. Phys. 45, 639 (1966).

U. Ganiel, M. Kestigian and S. Shtrikman, Phys. Letters 24A, 577 (1967); G. K. Wertheim, H. J. Guggenheim, H. J. Williams, and P. N. E. Buchanan, Phys. Rev. 158, 446 (1967).

Landolt-Bornstein, Tabellen Magnetische und Elektrischen Eigenschaften 9-II (Springer, Berlin, 1963).

W. W. Holloway, Jr. and M. Kestigian, J. Appl. Phys. 38, 1480 (1967).

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