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A Quantum Spin Wave Theory for an Ising Ferromagnet in a Transverse Magnetic Field
Author(s) -
Filatova L. D.,
Tsukernik V. M.
Publication year - 1975
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.2220700103
Subject(s) - condensed matter physics , physics , ising model , ferromagnetism , magnetic field , spin wave , magnetic anisotropy , quantum electrodynamics , quantum mechanics , magnetization
With consideration of the Ising model a single‐axis ferromagnet is described to which a steady magnetic field is applied perpendicular to the anisotropy axis. The dispersion law for elementary excitations of such a system are derived in the extreme cases of weak and strong magnetic fields. It is shown that in the case of weak magnetic field an essential difference between quantum and classical results exists contrary to the case of strong magnetic field.