Title :
Surface and bulk spin waves in antiferromagnetic perovskites and their interaction with defects near surfaces
Author :
Paczek, I.D. ; Chen, Niu-Niu ; Cottam, M.G.
Author_Institution :
Dept. of Phys., Western Ontario Univ., London, Ont., Canada
fDate :
11/1/1991 12:00:00 AM
Abstract :
The effect of a single magnetic impurity on the excitation spectrum of a semi-infinite Heisenberg antiferromagnet is studied by Green-function methods. The influence of bulk and surface spin waves on the impurity-mode energies is determined, and the theory is applied to perovskite-structure antiferromagnets
Keywords :
Green´s function methods; Heisenberg model; antiferromagnetism; magnetic impurity interactions; magnetic surface phenomena; spin waves; Green-function methods; antiferromagnetic perovskites; bulk spin waves; excitation spectrum; impurity-mode energies; magnetic impurity; semi-infinite Heisenberg antiferromagnet; surface spin waves; Anisotropic magnetoresistance; Antiferromagnetic materials; Equations; Green function; Impurities; Lattices; Magnetic anisotropy; Magnetic materials; Perpendicular magnetic anisotropy; Surface waves;
Journal_Title :
Magnetics, IEEE Transactions on
