Curved domain walls dynamics driven by magnetic field and electric current in hard ferromagnets

Giancarlo Consolo; Carmela Curro; Giovanna Valenti

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Curved domain walls dynamics driven by magnetic field and electric current in hard ferromagnets

机译：硬铁磁体中磁场和电流驱动的弯曲畴壁动力学

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The propagation of curved domain walls in hard ferromagnetic materials is studied by applying a reductive perturbation method to the generalized Landau-Lifshitz-Gilbert equation. The extended model herein considered explicitly takes into account the effects of a spin-polarized current as well as those arising from a nonlinear dissipation. Under the assumption of steady regime of propagation, the domain wall velocity is derived as a function of the domain wall curvature, the nonlinear damping coefficient, the magnetic field and the electric current. Threshold and Walker-like breakdown conditions for the external sources are also determined. The analytical results are evaluated numerically for different domain wall surfaces (planes, cylinders and spheres) and their physical implications are discussed.

机译：通过对广义的Landau-Lifshitz-Gilbert方程应用还原扰动法，研究了硬铁磁材料中弯曲畴壁的传播。本文中考虑的扩展模型明确考虑了自旋极化电流以及非线性耗散产生的影响。在稳定的传播状态下，畴壁速度是畴壁曲率，非线性阻尼系数，磁场和电流的函数。还确定了外部源的阈值和类似Walker的故障条件。对不同域壁表面（平面，圆柱体和球体）的分析结果进行了数值评估，并讨论了其物理意义。

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来源
《Applied Mathematical Modelling》 |2014年第3期|1001-1010|共10页
作者
Giancarlo Consolo; Carmela Curro; Giovanna Valenti;
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作者单位

Department of Mathematics and Computer Science, University of Messina, V.le F. D'Alcontres, I-98166 Messina, Italy;

Department of Mathematics and Computer Science, University of Messina, V.le F. D'Alcontres, I-98166 Messina, Italy;

Department of Mathematics and Computer Science, University of Messina, V.le F. D'Alcontres, I-98166 Messina, Italy;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
Curved domain walls; Micromagnetism; Nonlinear dissipation; Reductive perturbation method; Spin-transfer-torque;

机译：弯曲的畴壁;微磁性非线性耗散;还原摄动法;自转扭矩;

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Curved domain walls dynamics driven by magnetic field and electric current in hard ferromagnets

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