Vector model for the study of hysteresis under stress
Vector model for the study of hysteresis under stress
复制标题
用于研究应力下磁滞现象的矢量模型
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
G. Bertotti
中科院分区：
文献类型：
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作者：
C. Sasso;V. Basso;M. LoBue;G. Bertotti
提出了一种双轴各向异性结构中磁滞回线的矢量模型，其中显式地考虑了磁弹性效应。单个颗粒的磁化矢量被强迫沿着一个易轴，并在外场和磁弹性能量的总和的控制下，从一个易轴跳跃到另一个易轴。磁滞效应用与磁化反转相反的势垒来描述，系统的总响应通过对所有颗粒的局域磁化强度求平均来获得。对压应力下Si-Fe合金的磁滞特性进行了模型预测与实验结果的比较。
A vector model of magnetic hysteresis in biaxial anisotropy structures is presented, in which magnetoelastic effects are explicitly taken into account. The magnetization vector of individual grains is forced to lie along one of the easy axis, and jumps from one easy direction to another one controlled by the sum of the external field and magnetoelastic energy. Hysteresis effects are described by an energy barrier opposing magnetization switching and the total response of the system is obtained by averaging the local magnetization over all grains. Model predictions are compared with experimental results on the hysteresis properties of Si–Fe alloys under compressive stress.