论文标题

温度依赖性各向异性磁路术和自旋变速器驱动的涡流动力学

Temperature-Dependent Anisotropic Magnetoresistance and Spin-Torque-Driven Vortex Dynamics in a Single Microdisk

论文作者

Lendinez, Sergi, Polakovic, Tomas, Ding, Junjia, Jungfleisch, Matthias Benjamin, Pearson, John E., Hoffmann, Axel, Novosad, Valentine

论文摘要

由于当前密度的需求降低,效率提高以及易于实施不同的设备和材料,旋转轨道驱动的动力学最近对磁力领域引起了人们的兴趣。从实际的角度来看,低于1 GHz的低频动力学特别有趣,因为与磁性域相关的动态位于该频率范围内。尽管已经对高频模式的自旋变速器激发进行了广泛的研究,但中间的低频动力学受到了较少的注意,尽管可以使用自旋扭矩来操纵自旋质地,又可以用于动力学的激发。在这项工作中,我们证明可以通过在不同温度下通过自旋式旋转扭矩在单个微电极中驱动磁性涡旋动力学,并将结果与​​运输特性相关联。我们发现,核心夫妇的旋转模式与低频微波信号,并产生可测量的电压。动态测量与磁运输测量相一致,并由微磁模拟支持。我们的结果为在Spintronic应用中集成了磁性涡流设备打开了大门。

Spin-orbit-torque-driven dynamics have recently gained interest in the field of magnetism due to the reduced requirement of current densities and an increase in efficiency, as well as the ease of implementation of different devices and materials. From a practical point of view, the low-frequency dynamics below 1 GHz is particularly interesting since dynamics associated with magnetic domains lie in this frequency range. While spin-torque excitation of high-frequency modes has been extensively studied, the intermediate low-frequency dynamics have received less attention, although spin torques could potentially be used for both manipulation of the spin texture, as well as the excitation of dynamics. In this work, we demonstrate that it is possible to drive magnetic vortex dynamics in a single microdisk by spin-Hall torque at varying temperatures, and relate the results to transport properties. We find that the gyrotropic mode of the core couples to the low-frequency microwave signal and produces a measurable voltage. The dynamic measurements are in agreement with magnetic transport measurements and are supported by micromagnetic simulations. Our results open the door for integrating magnetic vortex devices in spintronic applications.

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