arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1909.12445cond-mat.mes-hallcond-mat.other
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具有大自旋-电荷转换的热驱动双磁体纳米振荡器

Thermally driven two-magnet nano-oscillator with large spin-charge conversion

Bassim Arkook, Christopher Safranski, Rodolfo Rodriguez, Ilya N. Krivorotov, Tobias Schneider, Kilian Lenz, Jürgen Lindner, Houchen Chang, Mingzhong Wu, Yarosla… 展开作者

Bassim Arkook, Christopher Safranski, Rodolfo Rodriguez, Ilya N. Krivorotov, Tobias Schneider, Kilian Lenz, Jürgen Lindner, Houchen Chang, Mingzhong Wu, Yaroslav Tserkovnyak, Igor Barsukov

摘要:

下一代自旋电子学应用所需的材料特性很难由一种候选材料满足。在这里,我们表明,通过结合绝缘和金属磁体,增强自旋电荷转换和节能热自旋电流可以实现。我们开发了一种由钇铁石榴石和坡莫合金双层组成的纳米线器件。界面温度梯度驱动纳米线磁化进入千兆赫频率的自动振荡。坡莫合金层的界面自旋耦合和磁阻将自旋动力学转化为相当大的微波信号。研究结果显示了高能效自旋电子器件的发展前景,并给出了在非均匀磁系统中实现磁振子凝聚的实验方案。

英文摘要:

Next-generation spintronic applications require material properties that can be hardly met by one material candidate. Here we demonstrate that by combining insulating and metallic magnets, enhanced spin-charge conversion and energy-efficient thermal spin currents can be realized. We develop a nanowire device consisting of an yttrium iron garnet and permalloy bi-layer. An interfacial temperature gradient drives the nanowire magnetization into auto-oscillations at gigahertz frequencies. Interfacial spin coupling and magnetoresistance of the permalloy layer translate spin dynamics into sizable microwave signals. The results show prospect for energy-efficient spintronic devices and present an experimental realization of magnon condensation in a heterogeneous magnetic system.

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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