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arXiv 1606.07280cond-mat.mtrl-sci
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具有斜磁化和Dzyaloshinskiii-Moriya相互作用的自旋霍尔纳米振荡器作为Skyrmion和非互易自旋波的generator

Spin-Hall nano-oscillator with oblique magnetization and Dzyaloshinskii-Moriya interaction as generator of skyrmions and nonreciprocal spin-waves

A. Giordano, R. Verba, R. Zivieri, A. Laudani, V. Puliafito, G. Gubbiotti, R. Tomasello, G. Siracusano, B. Azzerboni, M. Carpentieri, A. Slavin, G. Finocchio

摘要:

自旋霍尔振荡器是用于磁振子应用的有希望的自旋波信号源,并且可以用作超低功耗计算设备中的磁振子逻辑的构建块。在这里,我们分析和微磁学研究磁化动力学的自旋霍尔振荡器与倾斜磁化时,自旋霍尔效应和界面Dzyaloshinskiii-Moriya相互作用同时作用。我们的主要结果是:(一)激发的非互易自旋波传播垂直于平面内的静态磁化投影,(二)Skyrmion产生纯自旋电流,(三)激发一个新的自旋波模式与螺旋空间轮廓起源于一个动态Skyrmion的gyrotropic旋转。这些结果表明,自旋霍尔振荡器可用作磁数据存储和信号处理应用中磁skyrmions和不同类型传播自旋波的发生器。

英文摘要:

Spin-Hall oscillators are promising sources of spin-wave signals for magnonics applications, and can serve as building blocks for magnonic logic in ultralow power computation devices. Here, we analytically and micromagnetically study magnetization dynamics excited in a Spin-Hall oscillator with oblique magnetization when the spin-Hall effect and interfacial Dzyaloshinskii-Moriya interaction act simultaneously. Our key results are (i) excitation of nonreciprocal spin-waves propagating perpendicularly to the in-plane projection of the static magnetization, (ii) skyrmions generation by pure spin-current, (iii) excitation of a new spin-wave mode with a spiral spatial profile originating from a gyrotropic rotation of a dynamical skyrmion. These results demonstrate that Spin-Hall oscillators can be used as generators of magnetic skyrmions and different types of propagating spin-waves for magnetic data storage and signal processing applications.

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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