Current-driven dynamics of non-collinear antiferromagnetic spin structures for functional spintronic devices

用于功能自旋电子器件的非共线反铁磁自旋结构的电流驱动动力学

• 批准号: 20K15155
• 负责人: DUTTAGUPTA SAMIK
• 金额: $ 2.66万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2020
• 资助国家: 日本
• 起止时间: 2020-04-01 至 2023-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-20K15155/
• 关键词: Antiferromagnet; Topology; Weyl semimetal; AFM Spintronics; AFM spintronics; Weyl semimetals; Band structure topology; Non collinear

The concerted effort of relativistic spin-orbit interaction, electronic band topology and magnetic order in antiferromagnetic Weyl semimetals (WSM-AFMs) manifests itself in novel properties, crucial for development of antiferromagnetic spintronics. We quantified magnetotransport properties of polycrystalline and epitaxial WSM-AFM/heavy-metal structures which revealed signatures of chiral anomaly in condensed matter systems. We utilized anomalous Nernst effect for different crystallographic orientations (C and M-plane) of the epitaxial structure. Our observations show an electronic route towards characterization of topological nature of electronic bands in Weyl semimetals.

反铁磁Weyl半金属（WSM-AFMs）中的相对论自旋轨道相互作用、电子能带拓扑和磁序的协同作用表现出了对反铁磁自旋电子学发展至关重要的新性质。我们量化了多晶和外延WSM-AFM/重金属结构的磁输运性质，揭示了凝聚态系统中手性异常的特征。我们利用反常能斯特效应的不同的晶体取向（C和M-平面）的外延结构。我们的观察显示了一个电子的路线走向外尔半金属的电子带的拓扑性质的表征。

项目成果

Unconventional Hall effect and its modification in 2D van der Waals Fe3GeTe2

二维范德华 Fe3GeTe2 中的非常规霍尔效应及其修正

• 发表时间: 2021
• 作者: R. Roy Chowdhury;S. DuttaGupta;C. Patra;Oleg A. Tretiakov;S. Sharma;S. Fukami;H. Ohno and R. P. Singh
• 通讯作者: H. Ohno and R. P. Singh

Evaluation of resistivity in Ta-O/Co-Fe-B multilayers with the presence of interfacial scattering

存在界面散射的 Ta-O/Co-Fe-B 多层电阻率评估

• 发表时间: 2021
• 作者: T. V. A. Nguyen; S. DuttaGupta;Y. Saito;K. V. De Zoysa;S. Fukami;S. Ikeda;T. Endoh;Y. Endo
• 通讯作者: Y. Endo

Metallic Antiferromagnetic Spintronics

金属反铁磁自旋电子学

• 发表时间: 2021
• 作者: Ke Tang;Yong-Chang Lau;Kenji Nawa;Zhenchao Wen;Qingyi Xiang;Hiroaki Sukegawa;Takeshi Seki;Yoshio Miura;Koki Takanashi;and Seiji Mitani;Samik DuttaGupta
• 通讯作者: Samik DuttaGupta

Modification of topological Hall effect with Co-doping in the uniaxial van der Waals ferromagnet (CoxFe1-x)3GeTe2

单轴范德华铁磁体 (CoxFe1-x)3GeTe2 中共掺杂对拓扑霍尔效应的修改

• 发表时间: 2021
• 作者: R. Roy Chowdhury;S. DuttaGupta;C. Patra;S. Sharma;S. Fukami;H. Ohno and R. P. Singh
• 通讯作者: H. Ohno and R. P. Singh

Observation of domain structure in non-collinear antiferromagnetic Mn3Sn thin films by magneto-optical Kerr effect

利用磁光克尔效应观察非共线反铁磁Mn3Sn薄膜中的磁畴结构

• 发表时间: 2022
• 期刊: Applied Physics Letters (accepted)
• 作者: Tomohiro Uchimura;Ju-Young Yoon;Yuma Sato;Yutaro Takeuchi;Shun Kanai;Ryota Takechi;Keisuke Kishi;Yuta Yamane;Samik DuttaGupta;Jun’ichi Ieda; Hideo Ohno;and Shunsuke Fukami
• 通讯作者: and Shunsuke Fukami