arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2001.06857cond-mat.mtrl-sci
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用X射线共振磁反射法研究Pt中磁邻近效应对Pt/Co/Ta三层膜总磁矩的影响

Impact of the magnetic proximity effect in Pt on the total magnetic moment of Pt/Co/Ta trilayers studied by x-ray resonant magnetic reflectivity

Anastasiia Moskaltsova, Jan Krieft, Dominik Graulich, Tristan Matalla-Wagner, Timo Kuschel

摘要:

在本工作中,我们研究了磁性邻近效应(MPE)的影响,在薄膜三层系统的总磁矩的铁磁体(FM)的Co相邻的重金属(HMs)的Pt和Ta。我们研究了具有不同堆叠顺序的三层体系HM 1/FM/HM 2以及没有任何MPE的参考双层。X射线共振磁反射率(XRMR)是探测多层膜界面处感生磁性的有力工具。利用XRMR,我们能够获得磁深度剖面的结构,光学和磁性参数。通过对实验数据进行高斯型磁光分布的拟合,并考虑到界面处的结构粗糙度,我们可以提取自旋极化层的磁矩。将获得的磁矩与样品的测量总磁矩进行比较,我们可以确定MPE对系统总磁矩的影响。这些信息对于分析自旋输运实验至关重要,包括自旋轨道扭矩和自旋霍尔角测量,其中必须考虑饱和磁化强度$M_s$。因此,通过结合磁化强度测量和XRMR方法,我们能够得到一个完整的图片的磁矩分布在这些三层系统包含自旋极化铂。

英文摘要:

In this work, we study the influence of the magnetic proximity effect (MPE) in Pt on the total magnetic moment of thin film trilayer systems consisting of the ferromagnet (FM) Co adjacent to the heavy metals (HMs) Pt and Ta. We investigate the trilayer systems HM1/FM/HM2 with different stacking order as well as a reference bilayer without any MPE. X-ray resonant magnetic reflectivity (XRMR) is a powerful tool to probe induced magnetism, especially when buried at interfaces in a multilayer. By using XRMR, we are able to obtain magnetic depth profiles of the structural, optical and magnetic parameters. By fitting the experimental data with a Gaussian-like magnetooptic profile taking the structural roughness at the interface into account, we can extract the magnetic moment of the spin-polarized layer. Comparing the obtained moments to the measured total moment of the sample, we can determine the impact of the MPE on the total magnetic moment of the system. Such information can be critical for analyzing spin transport experiments, including spin-orbit torque and spin Hall angle measurements, where the saturation magnetization $M_s$ has to be taken into account. Therefore, by combining magnetization measurements and XRMR methods we were able to get a complete picture of the magnetic moment distribution in these trilayer systems containing spin-polarized Pt.

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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