COMPUTER-SIMULATION STUDY OF MAGNETIC-RELAXATION IN ANISOTROPIC MAGNETIC SYSTEMS

被引:13
作者
GONZALEZMIRANDA, JM
TEJADA, J
机构
[1] Departamento de Física Fundamental, Universidad de Barcelona, 08028 Barcelona, Av. Diagonal
来源
PHYSICAL REVIEW B | 1994年 / 49卷 / 06期
关键词
D O I
10.1103/PhysRevB.49.3867
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We present a computer-simulation study of the effect of the distribution of energy barriers in an anisotropic magnetic system on the relaxation behavior of the magnetization. While the relaxation law for the magnetization can be approximated in all cases by a time logarithmic decay, the law for the dependence of the magnetic viscosity with temperature is found to be quite sensitive to the shape of the distribution of barriers. The low-temperature region for the magnetic viscosity never extrapolates to a positive no-null value. Moreover our computer simulation results agree reasonably well with some recent relaxation experiments on highly anisotropic single-domain particles.
引用
收藏
页码:3867 / 3873
页数:7
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