TIME-DEPENDENT MAGNETIZATION IN FINE-PARTICLE FERROMAGNETIC SYSTEMS
TIME-DEPENDENT MAGNETIZATION IN FINE-PARTICLE FERROMAGNETIC SYSTEMS
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DOI：
10.1016/0304-8853(83)90037-9
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发表时间：
1983-01-01
影响因子：
2.7
通讯作者：
TANNER, BK
中科院分区：
文献类型：
--
作者：
CHANTRELL, RW;HOON, SR;TANNER, BK
提出了一种新理论来描述细颗粒铁磁系统等温剩磁的随时间衰减。基于非常窄的粒度分布范围内的弛豫时间总和，获得了模型的解析表达式。该模型预测了小尺寸的磁化强度衰减，但大尺寸的磁化强度依赖于 at-1。将结果与冷冻钴细颗粒磁性流体的精确实验数据进行比较。在大的测量时间范围内发现理论与实验之间具有极好的一致性。
A new theory is presented to describe the time-dependent decay of the isothermal remanent magnetization of a fine-particle ferromagnetic system. Analytical expressions are obtained for a model based on the summation of relaxation times over a very narrow range of the particle size distribution. The model predicts the well established lntdecay of magnetization for smalltbut at-1-dependence for larget. The results are compared with precise experimental data taken on a frozen Co fine-particle magnetic fluid. Excellent agreement between theory and experiment is found over a large measurement time-scale.