Dynamics of Topological Textures in Antiferromagnetic Nanostructures
| Project/Area Number |
25800184
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics II
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| Research Institution | Tohoku University |
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Principal Investigator |
Tretiakov Oleg 東北大学, 金属材料研究所, 助教 (50643425)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 反強磁性体 / 磁壁ダイナミクス / トポロジカルスピンテクスチャー / スキルミオン / トポロジカルスピンテクス チャ / トポロジカルスピンテクスチャ / skyrmions |
|---|
| Outline of Final Research Achievements |
We derived equations of motion for the staggered dynamics in antiferromagnets by using collective coordinates approach [Phys. Rev. Lett. 110, 127208 (2013)]. Based on it we were able to describe the dynamics of antiferromagnetic skyrmions [Phys. Rev. Lett. 116, 147203 (2016)]. An antiferromagnetic Skyrmion is a compound topological object with a similar but of opposite sign spin texture on each sublattice, which results in the absence of topological Hall effect. We find that this composite nature gives rise to different dynamical behavior, both due to current and temperature effects. Another achievement is related to the study of domain wall dynamics in a magnetoelectric antiferromagnet and its implications for magnetoelectric memory applications [Appl. Phys. Lett. 108, 132403 (2016)]. We found that the domain wall mobility has a maximum as a function of electric field due to the induced gyrotropic coupling.
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Report
(4 results)
Research Products
(58 results)
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[Journal Article] Spin Seebeck Power Conversion2015
Author(s)
A. B. Cahaya, Oleg A. Tretiakov, and G. E. W. Bauer
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Journal Title
IEEE Transactions on Magnetics
Volume: 51
Issue: 9
Pages: 0800414-0800414
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Presentation] Antiferromagnetic Skyrmions2015
Author(s)
Oleg A. Tretiakov
Organizer
Solid State Physics seminar
Place of Presentation
University of Mainz, Mainz, Germany
Year and Date
2015-07-19
Related Report
Int'l Joint Research / Invited
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[Presentation] Antiferromagnetic Skyrmions2015
Author(s)
Oleg A. Tretiakov
Organizer
Condensed Matter Theory Seminar
Place of Presentation
University of Cologne, Cologne, Germany
Year and Date
2015-07-11
Related Report
Int'l Joint Research / Invited
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[Presentation] Antiferromagnetic Skyrmions2015
Author(s)
Oleg A. Tretiakov
Organizer
International workshop on New Perspectives in Spintronic and Mesoscopic Physics (NPSMP 2015)
Place of Presentation
ISSP, University of Tokyo, Kashiwa, Japan
Year and Date
2015-06-01
Related Report
Int'l Joint Research / Invited
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[Presentation] Antiferromagnetic Skyrmions2015
Author(s)
O.A. Tretiakov
Organizer
2nd Zao Spintronics International Workshop
Place of Presentation
Ohira Hotal, Zao, Yamagata (Japan)
Year and Date
2015-01-18 – 2015-01-19
Related Report
Invited
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