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Mechanically driven domain wall movement in magnetoelastic nanomagnets

机译:磁弹性纳米磁体中的机械驱动畴壁运动

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摘要

Magnetic domain walls are fundamental objects arising in ferromagnetic materials, largely investigated both through micromagnetic simulations and experiments. While current- and field-based techniques for inducing domain wall propagation have been widely studied for fundamental understanding and application-oriented purposes, the possibility to manipulate domain walls using mechanical stress in magnetoelastic materials has only recently drawn interest. Here, a complete analytical model describing stress-induced transverse domain wall movement in ferromagnetic nanostripe with variable cross-section is presented. This approach yields a nonlinear integro-differential equation describing the magnetization field. Its numerical implementation, based on the nonlinear relaxation method, demonstrates the possibility to precisely control the position of a domain wall through mechanical action.
机译:磁畴壁是铁磁材料中产生的基本物体,通过微磁模拟和实验进行了大量研究。尽管出于基础理解和面向应用的目的,已经广泛地研究了基于电流和场的诱导畴壁传播的技术,但直到最近才引起人们的兴趣,即利用磁弹性材料中的机械应力操纵畴壁。在这里,一个完整的分析模型描述了应力诱导横向磁畴壁在具有可变横截面的铁磁纳米带中的运动。这种方法产生了描述磁化场的非线性积分微分方程。其基于非线性松弛方法的数值实现证明了通过机械作用精确控制畴壁位置的可能性。

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