Quantum effects in anisotropic Heisenberg ferromagnets

The anisotropic Heisenberg Hamiltonian is exactly rewritten like the generalized Hubbard model Hamiltonian using atomic operators representation and treated with diagram technique for Hubbard operators. The theory of anisotropic ferromagnets is developed similarly to Vaks, Larkin and Pikin theory of...

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Bibliographic Details
Published in:Solid state communications 1985-01, Vol.54 (6), p.509-512
Main Authors: Ovchinnikov, S.G., Valkova, T.A.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
General theory and models of magnetic ordering
Magnetic properties and materials
Physics
Quantized spin models
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Summary:The anisotropic Heisenberg Hamiltonian is exactly rewritten like the generalized Hubbard model Hamiltonian using atomic operators representation and treated with diagram technique for Hubbard operators. The theory of anisotropic ferromagnets is developed similarly to Vaks, Larkin and Pikin theory of isotropic ferromagnets. Quantum reduction of spin at T = 0, low temperature magnetization and Curie temperature are investigated for easy plane and cubic ferromagnets.
ISSN:0038-1098
1879-2766
DOI:10.1016/0038-1098(85)90658-1