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arXiv 1902.02063cond-mat.mtrl-sci
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反铁磁Mn $_2$ Au中电流感生Néel矢量翻转的成像

Imaging of current induced Néel vector switching in antiferromagnetic Mn$_2$Au

S. Yu. Bodnar, M. Filianina, S. P. Bommanaboyena, T. Forrest, F. Maccherozzi, A. A. Sapozhnik, Y. Skourski, M. Kläui, M. Jourdan

摘要:

利用X射线磁线性二向色性-光电子显微镜(XMLD-PEEM)研究了电流感生Néel自旋轨道矩对外延Mn $_2$ Au薄膜反铁磁畴结构的影响.我们观察到电流感应开关的AFM域基本上对应于样品的形态特征。在样品的不同部分获得了可逆以及不可逆的Néel矢量重定向,并且证明了在10 $μ$ m的视场中高达30%的所有域的切换。我们的直接显微镜观察相比,完全符合各向异性磁阻效应先前归因于电流诱导的Néel矢量开关在Mn $_2$金。

英文摘要:

The effects of current induced Néel spin-orbit torques on the antiferromagnetic domain structure of epitaxial Mn$_2$Au thin films were investigated by X-ray magnetic linear dichroism - photoemission electron microscopy (XMLD-PEEM). We observed current induced switching of AFM domains essentially corresponding to morphological features of the samples. Reversible as well as irreversible Néel vector reorientation was obtained in different parts of the samples and the switching of up to 30 % of all domains in the field of view of 10 $μ$m is demonstrated. Our direct microscopical observations are compared to and fully consistent with anisotropic magnetoresistance effects previously attributed to current induced Néel vector switching in Mn$_2$Au.

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