The spin-wave theory in the Holstein-Primakoff formulation is applied to thin ferromagnetic films. A magnetic anisotropy term is included in the Hamiltonian. A discussion is given of the dependence of the magnetic properties on the temperature and on the number n of monatomic layers of the thin film. The influence of possible parallel and perpendicular anisotropy is also discussed.
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A. Corciovei (1963) studied this question.
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