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首页> 外文期刊>Physica, B. Condensed Matter >Training effect in magnetoactive elastomers due to undermagnetization of magnetically hard filler
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Training effect in magnetoactive elastomers due to undermagnetization of magnetically hard filler

机译：由于磁力硬质填充物不足，磁性弹性体训练效应

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Hysteresis loops of magnetoactive elastomers (MAE) exhibit several peculiar features, including low coercivity in comparison with mechanically hard materials and a striking mismatch between first consecutive magnetization loops. The difference between loops diminishes during cycling of the applied magnetic field, thus displaying a training effect. The article presents the results of our research on a hypothesis explaining this phenomenon. Magnetization of a multigrain ferromagnetic particle is modeled at fields not exceeding the anisotropy field of the constituent grain material. It is shown that because of rotation of particles in an elastomer matrix, different branches of their hysteresis loops stem from the magnetization switching of different grain groups. This process is illustrated in detail by use of simple systems with a small number of grains. The results of simulation are supported with magnetic measurements of both MAE samples and epoxied powder. Coercivity of the modeled trained loops is in the order-of-magnitude agreement with the experiment.
机译：磁性活性弹性体（MAE）的滞后环具有几种特征，包括与机械硬材料相比的低矫顽力，以及第一连续磁化环之间的醒目不匹配。环路之间的差异在所施加的磁场的循环期间减小，从而显示训练效果。本文介绍了我们对解释这种现象的假设的研究结果。多雷亚克磁性粒子的磁化在不超过组成粒材料的各向异性场的场上进行建模。结果表明，由于弹性体基质中的颗粒旋转，其滞后的不同分支环绕不同晶粒组的磁化切换。通过使用具有少量谷物的简单系统详细说明该过程。模拟结果支持MAE样品和环氧粉末的磁测量。模型训练循环的矫顽力是与实验的数量级协定。

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