Quantum theory of the high frequency properties of an Ising ferromagnet in a transverse field
L. D. FilatovaPhyscotechnical Institute of Low Temperatures of the Academy of Sciences of the Ukrainian SSRV. M. TsukernikPhyscotechnical Institute of Low Temperatures of the Academy of Sciences of the Ukrainian SSR
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The high frequency magnetic susceptibility tensor of an Ising ferromagnet with arbitrary atomic spin in a weak constant magnetic field perpendicular to the anisotropy axis is calculated quantum mechanically. The result is compared with the result of a semiclassical calculation and it is shown that the quantum mechanical result differs significantly from the classical, agreeing only in the limit of infinite atomic spin.
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