TY - JOUR
T1 - Effects of spin fluctuation on the magnetic anisotropy constant of itinerant electron magnets
AU - Kobayashi, Naofumi
AU - Hyodo, Kazushige
AU - Sakuma, Akimasa
N1 - Publisher Copyright:
© 2016 The Japan Society of Applied Physics.
PY - 2016/10
Y1 - 2016/10
N2 - In the disordered local moment picture, we calculated the magnetization (M) and magnetic anisotropy energy (MAE) of FePt, CoPt, and MnAl ordered alloys and a body-centered tetragonal FeCo (bct-FeCo) disordered alloy, assuming spatially fluctuated spin configurations at finite temperatures. All alloys exhibit the relation K1(T)/K1(0) = (M(T)/M(0))n with the exponent n 2. This is consistent with the two-ion anisotropy model, in contrast to the usual single-ion anisotropy model exhibiting n = 3. Because these systems have different mechanisms of MAE, we suggest that this relation is a general rule for itinerant electron systems.
AB - In the disordered local moment picture, we calculated the magnetization (M) and magnetic anisotropy energy (MAE) of FePt, CoPt, and MnAl ordered alloys and a body-centered tetragonal FeCo (bct-FeCo) disordered alloy, assuming spatially fluctuated spin configurations at finite temperatures. All alloys exhibit the relation K1(T)/K1(0) = (M(T)/M(0))n with the exponent n 2. This is consistent with the two-ion anisotropy model, in contrast to the usual single-ion anisotropy model exhibiting n = 3. Because these systems have different mechanisms of MAE, we suggest that this relation is a general rule for itinerant electron systems.
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U2 - 10.7567/JJAP.55.100306
DO - 10.7567/JJAP.55.100306
M3 - Article
AN - SCOPUS:84989313296
VL - 55
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 10
M1 - 100306
ER -