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Analysis of Magnetostatic Modes Modified by Exchange and Anisotropy Energies
Author(s) -
Li Shaoping,
Cross L. E.
Publication year - 1990
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.2221590234
Subject(s) - condensed matter physics , dispersion relation , ferromagnetism , spin wave , exchange interaction , anisotropy , dispersion (optics) , physics , surface (topology) , quantum mechanics , mathematics , geometry
An investigation is made of magnetostatic modes modified by exchange interaction in anisotropic ferromagnets; and it gives a macroscopic description of influence of exchange interaction on Damon‐Eshbach surface modes. The classic Damon‐Eshbach (DE) and De Wames and Wolfram (DWW) theories of magnetic excitations in thin films is extended. A remarkable qualitative difference from previous theory is that all the spin wave vectors normal to the film are related to the exchange parameter. In case of weak exchange interaction, the critical angle between surface wave and bulk wave is modified according to the new circumstance and the spin wave dispersion relation is analysed.