Magnetization reversal in Ba‐ferrite particulate media
Magnetization reversal in Ba‐ferrite particulate media
复制标题
钡铁氧体颗粒介质中的磁化反转
DOI：
10.1063/1.340757
复制
发表时间：
1988
影响因子：
3.2
通讯作者：
D. Speliotis
中科院分区：
文献类型：
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作者：
D. Speliotis
本文通过测量和分析钡铁氧体颗粒介质中矫顽力、剩磁矫顽力和磁滞损失的角依赖性，以及旋转磁滞特性，研究了钡铁氧体颗粒介质中磁化反转的机理。为了避免退磁效应，测量分别在纵向定向和非定向介质中进行。磁性能的角依赖性根据取向程度和介质的颗粒对粘结剂的载荷而变化很大。我们的结论是，磁化反转的机制是一种非相干旋转，最有可能是扇形，但与紧密耦合的Ba铁氧体血小板状颗粒阵列中的卷曲非常相似。与理论模型预测结果的比较与实验结果吻合较好。取向介质的剩磁矫顽力随角度的增大是取向介质的一个重要特征。
In this paper, we investigated the mechanism of magnetization reversal in Ba‐ferrite particulate media by measuring and analyzing the angular dependence of the coercivity, the remanence coercivity, and the hysteresis losses, and also by investigating the rotational hysteresis properties. The measurements were performed in longitudinally oriented and in nonoriented media in order to avoid demagnetization effects. The angular dependence of the magnetic properties was found to vary widely depending on the degree of orientation and the particle‐to‐binder loading of the media. Our conclusion is that the mechanism of magnetization reversal is one of incoherent rotation, and most probably fanning, but closely resembling curling in the closely coupled arrays of the platelet‐shaped particles of Ba ferrite. Comparisons with the predictions of theoretical models agree well with our experimental results. The large increase of the remanence coercivity with angle for oriented media represents one of the most important ...