反強磁性体を用いたスピントロニクスの実験的研究

利用反铁磁体进行自旋电子学实验研究

• 批准号: 17F17026
• 负责人: 中辻 知
• 金额: $ 0.77万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2017
• 资助国家: 日本
• 起止时间: 2017-04-26 至 2018-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17F17026/
• 关键词: spin Hall effect; antiferromagnetism; spintronics; topology

The recent discovery of the large anomalous Hall effect (AHE) in the non-collinear Kagome antiferromagnets Mn3X has highlighted the compounds and alloys based on the combination of Mn and X. As the spin Hall effect (SHE), and AHE share the same origin, the injection of pure spin current into the alloys based on Mn and X could potentially engender large SHE. In the present work, we report that doping Mn with 18% Sn strikingly increases the spin Hall angle of the amorphous Mn-Sn alloy by as large as 20 times while the resistivity is reduced by 10 times compared with pure Mn. Our study not only serves as essential reference for pure spin current phenomena in Mn-based alloys but may also offer a promising method for exploring future energy saving spin Hall materials. Besides the amorphous films, we have also succeeded in making crystallized Mn3Sn thin films on various substrates which are beneficial for spintronics study. The summarization of parts of the research will be submitted to peer reviewed journal soon.

最近在非共线Kagome反铁磁体Mn3X中发现的大反常霍尔效应（large anomalous Hall effect， AHE）突出了基于Mn和X的化合物和合金。由于自旋霍尔效应（spin Hall effect， SHE）和AHE具有相同的起源，在基于Mn和X的合金中注入纯自旋电流可能会产生大反常霍尔效应。在本研究中，我们报道了在Mn中掺杂18%的Sn，使非晶Mn-Sn合金的自旋霍尔角显著增加了20倍，而电阻率比纯Mn降低了10倍。本研究不仅为研究锰基合金的纯自旋电流现象提供了重要的参考，而且为探索未来节能自旋霍尔材料提供了一种有希望的方法。除了非晶薄膜外，我们还成功地在各种衬底上制备了有利于自旋电子学研究的Mn3Sn结晶薄膜。部分研究摘要将于近期提交同行评议期刊。

项目成果

Magnetic and transport properties of an antiferromagnetic Weyl metal thin film

反铁磁韦尔金属薄膜的磁性和传输特性

• 发表时间: 2017
• 作者: T. Higo;T. Nishikawa;Danru Qu;Y. Li;C. L. Chien;Y. Otani;S. Nakatsuji
• 通讯作者: S. Nakatsuji

Thermoelectric properties of a Weyl metal thin film

Weyl金属薄膜的热电性能

• 发表时间: 2017
• 作者: T. Nishikawa;T. Higo;Danru Qu;Y. Li;T. Tomita;H. Narita;C. L. Chien;Y. Otani;and S. Nakatsuji
• 通讯作者: and S. Nakatsuji

Large spin Hall effect in Mn-Sn amorphous alloy

Mn-Sn非晶合金中的大自旋霍尔效应

• 发表时间: 2018
• 作者: D. Qu;T. Higo;T. Nishikawa;K. Matsumoto;K. Kondou;P.K. Muduli;Y. Otani;and S. Nakatsuji
• 通讯作者: and S. Nakatsuji

Inverse spin Hall effect in Au-Ta alloys

Au-Ta 合金中的逆自旋霍尔效应

• 发表时间: 2017
• 作者: D. Qu;S. Y. Huang;G. Y. Guo;and C. L. Chien
• 通讯作者: and C. L. Chien

ジョンズホプキンス大学(米国)

约翰·霍普金斯大学（美国）