TY - JOUR
T1 - Magnetization dynamics at elevated temperatures
AU - Xu, Lei
AU - Zhang, Shufeng
N1 - Funding Information:
This work is partially supported by the U.S. DOE (DE-FG02-06ER46307) and by the NSF (ECCS-1127751).
PY - 2012/8
Y1 - 2012/8
N2 - By using the quantum kinetic approach with the instantaneous local equilibrium approximation, we propose an equation that is capable of addressing magnetization dynamics for a wide range of temperatures. The equation reduces to the Landau-Lifshitz equation at low temperatures and to the paramagnetic Bloch equation at high temperatures. We further include the stochastic fields in the dynamic equation in order to take into account fluctuation at high temperatures. Our proposed equation overcomes the non-analytic damping coefficients in the Landau-Lifshitz-Bloch (known as LLB) equation and can be broadly used for modeling laser pump-probe experiments and heat assisted magnetic recording.
AB - By using the quantum kinetic approach with the instantaneous local equilibrium approximation, we propose an equation that is capable of addressing magnetization dynamics for a wide range of temperatures. The equation reduces to the Landau-Lifshitz equation at low temperatures and to the paramagnetic Bloch equation at high temperatures. We further include the stochastic fields in the dynamic equation in order to take into account fluctuation at high temperatures. Our proposed equation overcomes the non-analytic damping coefficients in the Landau-Lifshitz-Bloch (known as LLB) equation and can be broadly used for modeling laser pump-probe experiments and heat assisted magnetic recording.
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U2 - 10.1016/j.physe.2012.07.010
DO - 10.1016/j.physe.2012.07.010
M3 - Article
AN - SCOPUS:84866735682
VL - 45
SP - 72
EP - 76
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
SN - 1386-9477
ER -