Direct Spin-Lattice Relaxation of Divalent Cobalt Ions in Two Hydrated Complexes

A. G. Taylor; L. C. Olsen; D. K. Brice; J. W. Culvahouse

doi:10.1103/PhysRev.152.403

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Direct Spin-Lattice Relaxation of Divalent Cobalt Ions in Two Hydrated Complexes

A. G. Taylor^*, L. C. Olsen^†, D. K. Brice^‡, and J. W. Culvahouse

Department of Physics and Astronomy, The University of Kansas, Lawrence, Kansas

^*Present address: Department of Physics, Stevens Point College, Stevens Point, Wisconsin.
^†Present address: Donald W. Douglas Laboratory, Richland, Washington.
^‡Present address: Sandia Laboratory, Albuquerque, New Mexico.

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Phys. Rev. 152, 403 – Published 2 December, 1966

DOI: https://doi.org/10.1103/PhysRev.152.403

Abstract

Experimental measurements are reported for the allowed and forbidden relaxation rates in the hyperfine structure of divalent cobalt in the $Y$ site of lanthanum zinc double nitrate and in zinc fluosilicate. The static spin Hamiltonian of the $Y$ ion is characteristic of a large trigonal distortion, and that for the ion in the fluosilicate is characteristic of an intermediate trigonal distortion. The results are fitted by an extension of a theory used elsewhere to fit similar measurements on cobalt in the $X$ site of lanthanum zinc double nitrate. In all three cases, four adjustable constants are allowed by the theory. A good description of all of the many facets of the relaxation is obtained for all three types of sites.

References (10)

Wesley P. Unruh and J. W. Culvahouse, Phys. Rev. 129, 2441 (1963)
J. W. Culvahouse, Wesley P. Unruh, and David K. Brice, Phys. Rev. 129, 2430 (1963)
R. Orbach, Proc. Roy. Soc. (London) A264, 458 (1961)
R. C. Mikkelson and H. J. Stapleton, Phys. Rev. 140, A1968 (1965)
B. Bleaney and D. J. E. Ingram, Proc. Roy. Soc. (London) A208, 143 (1951)
A. Abragam and M. H. L. Pryce, Proc. Roy. Soc. (London) A206, 173 (1951)
[2]
L. C. Olsen, Ph.D. dissertation, University of Kansas, 1965 (unpublished)
J. H. Van Vleck, Phys. Rev. 57, 426 (1940) J. Chem. Phys. 7, 72 (1940)
R. de L. Kronig, Physica 6, 33 (1939)

[c1] Wesley P. Unruh and J. W. Culvahouse, Phys. Rev. 129, 2441 (1963)

[c2] J. W. Culvahouse, Wesley P. Unruh, and David K. Brice, Phys. Rev. 129, 2430 (1963)

[c3] R. Orbach, Proc. Roy. Soc. (London) A264, 458 (1961)

[c4] R. C. Mikkelson and H. J. Stapleton, Phys. Rev. 140, A1968 (1965)

[c5] B. Bleaney and D. J. E. Ingram, Proc. Roy. Soc. (London) A208, 143 (1951)

[c6] A. Abragam and M. H. L. Pryce, Proc. Roy. Soc. (London) A206, 173 (1951)

[c7] [2]

[c8] L. C. Olsen, Ph.D. dissertation, University of Kansas, 1965 (unpublished)

[c9] J. H. Van Vleck, Phys. Rev. 57, 426 (1940) J. Chem. Phys. 7, 72 (1940)

[c10] R. de L. Kronig, Physica 6, 33 (1939)

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Direct Spin-Lattice Relaxation of Divalent Cobalt Ions in Two Hydrated Complexes

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