2018 Fiscal Year Final Research Report
Non-axisymmetric skyrmions in chiral and frustrated magnets
| Project/Area Number |
17H06889
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Applied materials
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| Research Institution | Hiroshima University |
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Principal Investigator |
Leonov Andriy 広島大学, 理学研究科, 助教 (30804851)
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| Project Period (FY) |
2017-08-25 – 2019-03-31
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| Keywords | skyrmion / DM interaction / current-drive dynamics / micromagnetism |
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| Outline of Final Research Achievements |
I introduced a new class of isolated magnetic skyrmions emerging within tilted ferromagnetic phases of polar magnets with easy-plane anisotropy. The asymmetric magnetic structure of these skyrmions is associated with an intricate pattern of the energy density, which exhibits positive and negative asymptotics with respect to the surrounding state with a ferromagnetic moment tilted away from the polar axis. Correspondingly, the skyrmion-skyrmion interaction has an anisotropic character and can be either attractive or repulsive depending on the
relative orientation of the skyrmion pair. I investigated the stability of these asymmetric skyrmions against the elliptical cone state and followed their transformation into axisymmetric skyrmions, when the tilted ferromagnetic
moment of the host phase was reduced. My theoretical results gave clear directions for experimental studies of isolated asymmetric skyrmions and their clusters embedded in tilted ferromagnetic phases.
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| Free Research Field |
spintronics
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| Academic Significance and Societal Importance of the Research Achievements |
My research had a strong impact on the skyrmionic community: a) mathematical generalization of skyrmion classes; b) revision of experimental data on the visual skyrmion observation c) numerical simulation on the current-driven skyrmion motion, new prototypes of spintronic devices.
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