Contribution of the Fe 2+  ion to the magnetic anisotropy constant in ferrites | Zendy

Watanabe Y. | Zendy; Urade K. | Zendy; Saito S. | Zendy

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Contribution of the Fe 2+ ion to the magnetic anisotropy constant in ferrites

Author(s) -

Watanabe Y.,

Urade K.,

Saito S.

Publication year - 1978

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.2220900231

Subject(s) - anisotropy , ion , lattice constant , condensed matter physics , magnetic anisotropy , constant (computer programming) , materials science , lattice (music) , chemistry , analytical chemistry (journal) , physics , magnetization , magnetic field , diffraction , organic chemistry , quantum mechanics , computer science , acoustics , programming language , chromatography , optics

The magnetic anisotropy constant K 1 originating from the presence of Fe 2+ ions in ferrites is calculated, using the theory of Wolf, for a case that the electron hopping between Fe 2+ and Fe 3+ ions is allowed within a cluster of iron ions around some lattice defects. The calculated value of K 1 exhibits a characteristic temperature dependence, i.e. the change of the sign from positive at lower temperatures to negative at higher temperatures. It is shown that the result well agrees with the Fe 2+ contribution to K 1 estimated from the available data of the anisotropy constant for the Ni 1− x Fe 2+ x O 4 system.

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