TY - JOUR
T1 - Spin wave theory of double exchange ferromagnets
AU - Golosov, D. I.
PY - 2000/4/24
Y1 - 2000/4/24
N2 - We construct the 1/S spin wave expansion for double exchange ferromagnets at T = 0. It is assumed that the value of Hund's rule coupling, JH, is sufficiently large, resulting in a fully saturated, ferromagnetic half-metallic ground state. We evaluate corrections to the magnon dispersion law, and we also find that, in contrast to earlier statements in the literature, magnon-electron scattering does give rise to spin wave damping. We analyze the momentum dependence of these quantities and discuss the experimental implications for colossal magnetoresistance compounds.
AB - We construct the 1/S spin wave expansion for double exchange ferromagnets at T = 0. It is assumed that the value of Hund's rule coupling, JH, is sufficiently large, resulting in a fully saturated, ferromagnetic half-metallic ground state. We evaluate corrections to the magnon dispersion law, and we also find that, in contrast to earlier statements in the literature, magnon-electron scattering does give rise to spin wave damping. We analyze the momentum dependence of these quantities and discuss the experimental implications for colossal magnetoresistance compounds.
UR - http://www.scopus.com/inward/record.url?scp=18344401069&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.84.3974
DO - 10.1103/PhysRevLett.84.3974
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C2 - 11019253
AN - SCOPUS:18344401069
SN - 0031-9007
VL - 84
SP - 3974
EP - 3977
JO - Physical Review Letters
JF - Physical Review Letters
IS - 17
ER -