在 Co 基薄膜中使用 Pt100-xWx 合金增强自旋轨道力矩和磁化转换

Hongming Liang, Kuo Li, Mingyang Xu, Yao Zhang, Peiqiao Liu, Sizhe Wang, Zhiwen Sun, Ruizhi Yang, Guanghua Yu, Minghua Li
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引用次数: 0

摘要

重金属(HMs)合金化一直是提高自旋轨道力矩效率的有效方法。在本研究中,我们证明了 Pt100-xWx/Pt/Co/Ta 多层在高温退火后仍能保持垂直磁各向异性。在 Pt/Co/Ta 多层底部的 HM 铂 (Pt) 中掺入钨 (W) 能显著增加自旋霍尔角 (θSH),并降低临界开关电流密度 (Jc)。谐波霍尔测试结果表明,Pt88W12 合金薄膜的 θSH 约为 0.29,高于纯铂薄膜的 0.15。磁化切换测试表明,Pt94W6 合金薄膜的 Jc 约为 4.892 × 106 A/cm2,比纯铂薄膜低 51.9%。这项研究为降低相关应用设备的功耗和提高其效率提供了一种有价值的方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Enhancement of spin–orbit torque and magnetization switching by Pt100–xWx alloy in Co-based films
Alloying heavy metals (HMs) has been an effective method for enhancing the efficiency of spin–orbit torque. In this study, we demonstrate that Pt100−xWx/Pt/Co/Ta multilayers still maintain perpendicular magnetic anisotropy after high-temperature annealing. Doping tungsten (W) into HM platinum (Pt) at the bottom of a Pt/Co/Ta multilayer significantly increases the spin Hall angle (θSH) and reduces the critical switching current density (Jc). The harmonic Hall test results show that the θSH of the Pt88W12 alloy film is approximately 0.29, which is higher than that of the pure Pt film (0.15). The magnetization switching test reveals that the Jc of Pt94W6 alloy film is approximately 4.892 × 106 A/cm2, which is 51.9% lower than that of the pure Pt film. This study offers a valuable method for reducing power consumption and enhancing the efficiency of related application devices.
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