Spin transfer torque driven higher-order propagating spin waves in nano-contact magnetic tunnel junctions.,Nature Communications

当前位置： X-MOL 学术 › Nat. Commun. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Spin transfer torque driven higher-order propagating spin waves in nano-contact magnetic tunnel junctions.
Nature Communications ( IF 14.7 ) Pub Date : 2018-10-22 , DOI: 10.1038/s41467-018-06589-0
A Houshang _{1,

2} , R Khymyn ₁ , H Fulara ₁ , A Gangwar ₁ , M Haidar ₁ , S R Etesami ₁ , R Ferreira ₃ , P P Freitas ₃ , M Dvornik ₁ , R K Dumas ₁ , J Åkerman _{1,

2,

4}

Affiliation

Short wavelength exchange-dominated propagating spin waves will enable magnonic devices to operate at higher frequencies and higher data transmission rates. While giant magnetoresistance (GMR)-based magnetic nanocontacts are efficient injectors of propagating spin waves, the generated wavelengths are 2.6 times the nano-contact diameter, and the electrical signal strength remains too weak for applications. Here we demonstrate nano-contact-based spin wave generation in magnetic tunnel junctions and observe large-frequency steps consistent with the hitherto ignored possibility of second- and third-order propagating spin waves with wavelengths of 120 and 74 nm, i.e., much smaller than the 150-nm nanocontact. Mutual synchronization is also observed on all three propagating modes. These higher-order propagating spin waves will enable magnonic devices to operate at much higher frequencies and greatly increase their transmission rates and spin wave propagating lengths, both proportional to the much higher group velocity.

中文翻译：

自旋转移矩驱动纳米接触磁隧道结中的高阶传播自旋波。

短波长交换主导的传播自旋波将使磁振器件能够在更高的频率和更高的数据传输速率下运行。虽然基于巨磁阻 (GMR) 的磁性纳米接触是传播自旋波的有效注入器，但生成的波长是纳米接触直径的 2.6 倍，并且电信号强度对于应用来说仍然太弱。在这里，我们演示了磁隧道结中基于纳米接触的自旋波生成，并观察到与迄今为止被忽视的波长为 120 和 74 nm（即远小于150纳米纳米接触。在所有三种传播模式上也观察到相互同步。这些高阶传播自旋波将使磁振子器件能够在更高的频率下工作，并大大增加其传输速率和自旋波传播长度，两者都与更高的群速度成正比。

更新日期：2018-10-22

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文本刊介绍/投稿指南