arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2001.02212cond-mat.mtrl-sci
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生长条件对Pt/Co/Pt叠层中磁畴成核与畴壁传播的影响

Impact of growth conditions on the domain nucleation and domain wall propagation in Pt/Co/Pt stacks

C. P. Quinteros, M. J. Cortes Burgos, L. J. Albornoz, J. Gomez, P. Granell, F. Golmar, M. L. Ibarra, S. Bustingorry, J. Curiale, M. Granada

AI总结:

本文研究Pt/Co/Pt三层膜中Co厚度、衬底粗糙度和基础真空度对畴壁运动的影响,发现Co厚度决定矫顽场和畴壁速度,而衬底粗糙度与基础真空度分别选择性影响磁畴成核和畴壁传播。

摘要:

理解制备条件对具有垂直磁化薄膜中畴壁运动的影响是一个必要课题,以便调控其性能,从而设计基于该现象的自旋电子学器件。在此背景下,本工作旨在展示不同生长条件如何影响原型体系Pt/Co/Pt中的畴壁运动。三层膜通过直流溅射沉积,本研究中变化的参数为Co厚度、衬底粗糙度以及沉积室的基础真空度。采用基于磁光克尔效应的磁强计和显微镜,并结合X射线反射率、原子力显微镜和透射电子显微镜作为实验技术。这使我们能够阐明不同生长条件对磁滞回线和畴壁动力学产生的影响。与其他研究者一样,我们发现Co厚度对矫顽场和畴壁速度都具有强烈的决定性作用。相反,衬底的形貌粗糙度和沉积室的基础真空度分别对磁畴成核和畴壁传播表现出选择性影响,从而提供了一种调控这些性能的手段。

英文摘要:

Understanding the effect of fabrication conditions on domain wall motion in thin films with perpendicular magnetization is a mandatory issue in order to tune their properties aiming to design spintronics devices based on such phenomenon. In this context, the present work intends to show how different growth conditions may affect domain wall motion in the prototypical system Pt/Co/Pt. The trilayers were deposited by dc sputtering, and the parameters varied in this study were the Co thickness, the substrate roughness, and the base pressure in the deposition chamber. Magneto-optical Kerr effect-based magnetometry and microscopy combined with X-ray reflectometry, atomic force microscopy, and transmission electron microscopy were adopted as experimental techniques. This permitted us to elucidate the impact on the hysteresis loops and on the domain wall dynamics, produced by different growth conditions. As other authors, we found that Co thickness is strongly determinant for both the coercive field and the domain wall velocity. On the contrary, the topographic roughness of the substrate and the base pressure of the deposition chamber evidence a selective impact on the nucleation of magnetic domains and on domain wall propagation, respectively, providing a tool to tune these properties.

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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