Many-body Green's function theory for thin ferromagnetic anisotropic Heisenberg films: treatment of the exchange anisotropy

Details Many-body Green's function theory for thin ferromagnetic anisotropic Heisenberg films: treatment of the exchange anisotropy Many-body Green's function theory for thin ferromagnetic anisotropic Heisenberg films: treatment of the exchange anisotropy

2003-03-19

arxiv.org/abs/cond-mat/0303389v1

Eur.Phys. J. B 32, 445-455 (2003)

Physics

Condensed Matter

Statistical Mechanics

24 pages, 7 figures, accepted for publication in Eur. Phys. J. B

Scientific paper

10.1140/epjb/e2003-00126-3

The many-body Green's function theory developed in our previous work for treating the reorientation of the magnetization of thin ferromagnetic films is extended to include the exchange anisotropy. This leads to additional momentum dependencies which require some non-trivial changes in the formalism. The theory is developed for arbitrary spin values S and for multilayers. The effects of the exchange anisotropy and the single-ion anisotropy, which was treated in our earlier work, on the magnetic properties of thin ferromagnetic films are compared.

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