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arXiv 1902.04665cond-mat.mes-hall
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利用全角度自旋-轨道力矩磁力学相关性进行有效场分析

Effective field analysis using the full angular spin-orbit torque magnetometry dependence

Tomek Schulz, Kyujoon Lee, Benjamin Krüger, Roberto Lo Conte, Gurucharan V. Karnad, Karin Garcia, Laurent Vila, Berthold Ocker, Dafiné Ravelosona, Mathias Kläui

摘要:

自旋-轨道力矩保证了超高效的磁化切换,用于基于涌现准粒子(如畴壁和skyrmions)的先进设备。近年来,自旋结构动力学、自旋-轨道力矩可定制的材料和系统正在发展之中。一种允许检测给定系统中作为磁化方向的函数的作用转矩的方法是基于异常霍尔效应的高次谐波分析的转矩-磁力测量法。在这里,我们表明,有效领域的磁畴墙壁上的管理效率,他们的动态需要一个复杂的分析,考虑到完整的角度依赖的扭矩。使用1-D模型,我们比较了自旋轨道扭矩效率的脱钉测量和自旋扭矩磁强计。我们表明,有效领域可以准确地确定,我们发现很好的协议。因此,我们的方法现在允许我们快速筛选材料并预测由此产生的准粒子动力学。

英文摘要:

Spin-orbit torques promise ultra-efficient magnetization switching used for advanced devices based on emergent quasi-particles such as domain walls and skyrmions. Recently, the spin structure dynamics, materials and systems with tailored spin-orbit torques are being developed. A method, which allows one to detect the acting torques in a given system as a function of the magnetization direction is the torque-magnetometry method based on a higher harmonics analysis of the anomalous Hall-effect. Here we show that the effective fields acting on magnetic domain walls that govern the efficiency of their dynamics require a sophisticated analysis taking into account the full angular dependence of the torques. Using a 1-D model we compared the spin orbit torque efficiencies by depinning measurements and spin torque magnetometry. We show that the effective fields can be accurately determined and we find good agreement. Thus our method allows us now to rapidly screen materials and predict the resulting quasi-particle dynamics.

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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