Quantum effects of magnetization of an~easy-axis ferromagnet with $S=1$
Teoretičeskaâ i matematičeskaâ fizika, Tome 173 (2012) no. 2, pp. 333-352
Voir la notice de l'article provenant de la source Math-Net.Ru
We analyze the influence of quantum effects on magnetic properties of a strongly anisotropic easy-axis ferromagnet with single-ion anisotropy comparable to the exchange interaction of spins with $S=1$. We show that in this case, despite the quantum approach, we can apply a description inspired by the Landau theory of phase transitions. We consider two magnetization cases: by a longitudinal and by a transverse external magnetic field. We determine the critical values of the fields and find quantum corrections manifested in the so-called “shortening” of the mean spin modulus. We find that for a sufficiently large single-ion anisotropy, the angular dependence of the critical field differs from the Stoner–Wohlfarth astroid.
Keywords:
quantum phase transition, single-ion anisotropy, magnetizing easy-axis ferromagnet, critical field of remagnetization of easy-axis ferromagnet.
@article{TMF_2012_173_2_a8,
author = {V. M. Kalita and I. M. Ivanova and V. M. Loktev},
title = {Quantum effects of magnetization of an~easy-axis ferromagnet with $S=1$},
journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
pages = {333--352},
publisher = {mathdoc},
volume = {173},
number = {2},
year = {2012},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/TMF_2012_173_2_a8/}
}
TY - JOUR AU - V. M. Kalita AU - I. M. Ivanova AU - V. M. Loktev TI - Quantum effects of magnetization of an~easy-axis ferromagnet with $S=1$ JO - Teoretičeskaâ i matematičeskaâ fizika PY - 2012 SP - 333 EP - 352 VL - 173 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TMF_2012_173_2_a8/ LA - ru ID - TMF_2012_173_2_a8 ER -
%0 Journal Article %A V. M. Kalita %A I. M. Ivanova %A V. M. Loktev %T Quantum effects of magnetization of an~easy-axis ferromagnet with $S=1$ %J Teoretičeskaâ i matematičeskaâ fizika %D 2012 %P 333-352 %V 173 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_2012_173_2_a8/ %G ru %F TMF_2012_173_2_a8
V. M. Kalita; I. M. Ivanova; V. M. Loktev. Quantum effects of magnetization of an~easy-axis ferromagnet with $S=1$. Teoretičeskaâ i matematičeskaâ fizika, Tome 173 (2012) no. 2, pp. 333-352. http://geodesic.mathdoc.fr/item/TMF_2012_173_2_a8/