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首页> 外文期刊>Physica, B. Condensed Matter >Irreversible magnetization processes in a soft magnetic platelet
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Irreversible magnetization processes in a soft magnetic platelet

机译：软磁性血小板中不可逆的磁化过程

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摘要

The influence of an applied field on the magnetic domain structure of a permalloy platelet (3.2 #mu#m * 1 #mu#m * 80 em) is studied by means of micromagnetic finite element modeling. Starting from two different demagnetized domain states with nearly closed flux, a magnetic field is applied in-plane and increased stepwise. The magnetization process is determined by the motion of domain walls and domain structure conversion. Irreversible processes occur when 180 deg walls intersect an edge of the sample or when two domain walls cancel each other. A repetitive repositioning of the discretization points is used to both avoid numerical grid pinning effects and to reduce discretization errors. The numerical results compare favorably with experimental observations.
机译：通过微磁有限元模拟研究了外加磁场对坡莫合金血小板（3.2＃mu＃m * 1＃mu＃m * 80 em）磁畴结构的影响。从具有几乎闭合磁通的两个不同的退磁畴状态开始，磁场在平面内施加并逐步增大。磁化过程取决于畴壁的运动和畴结构的转换。当180度的壁与样品的边缘相交或两个畴壁相互抵消时，将发生不可逆的过程。离散点的重复定位既可以避免数值网格钉扎效应，又可以减少离散误差。数值结果与实验结果相吻合。

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