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arXiv 0903.3033cond-mat.mes-hall
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具有非均匀磁序参量的铁磁导体中的电子输运--畴壁电阻

Electronic transport in ferromagnetic conductors with inhomogeneous magnetic order parameter -- domain-wall resistance

Christian Wickles, Wolfgang Belzig

摘要:

本文从微观上推导了非均匀磁化分布铁磁材料中传导电子的输运方程。我们的量子动力学方法包括磁性杂质的弹性散射和各向异性自旋翻转散射。在扩散极限下,我们计算了畴壁的电阻,发现畴壁电阻可以是正的,也可以是负的。在长畴壁的限制下,我们推导出解析表达式,并与现有的工作,其中使用较少的一般模型或不同的理论框架进行比较。

英文摘要:

We microscopically derive transport equations for the conduction electrons in ferromagnetic materials with an inhomogeneous magnetization profile. Our quantum kinetic approach includes elastic scattering and anisotropic spin-flip scattering at magnetic impurities. In the diffusive limit, we calculate the resistance through a domain wall and find that the domain-wall resistance can be positive or negative. In the limit of long domain walls we derive analytical expressions and compare them with existing works, which used less general models or different theoretical frameworks.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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