Magnetic vortex in epitaxially-grown Co2(Fe,Mn)Si alloy

T. Yamamoto; T. Seki; M. Kotsugi; K. Takanashi

doi:10.1063/1.4945730

Magnetic vortex in epitaxially-grown Co₂(Fe,Mn)Si alloy

T. Yamamoto, T. Seki, M. Kotsugi, K. Takanashi

Materials Development Division

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

We report magnetic vortex formation in epitaxially grown Co₂Fe_0.4Mn_0.6Si (CFMS) Heusler alloy discs that was confirmed using photoemission electron microscopy and the magneto-optical Kerr effect. The phase diagram of magnetic domain structures as functions of the disc thickness (t) and diameter (D) indicates that the magnetic vortex is stable in wide ranges of t and D even for the epitaxial CFMS. The annihilation field of vortex core depended not only on the disc aspect ratio but also on t. Numerical simulation suggests that this t dependence results from extrinsic pinning of a vortex core due to the epitaxial growth.

Original language	English
Article number	152402
Journal	Applied Physics Letters
Volume	108
Issue number	15
DOIs	https://doi.org/10.1063/1.4945730
Publication status	Published - 2016 Apr 11

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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AU - Kotsugi, M.

AU - Takanashi, K.

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AB - We report magnetic vortex formation in epitaxially grown Co2Fe0.4Mn0.6Si (CFMS) Heusler alloy discs that was confirmed using photoemission electron microscopy and the magneto-optical Kerr effect. The phase diagram of magnetic domain structures as functions of the disc thickness (t) and diameter (D) indicates that the magnetic vortex is stable in wide ranges of t and D even for the epitaxial CFMS. The annihilation field of vortex core depended not only on the disc aspect ratio but also on t. Numerical simulation suggests that this t dependence results from extrinsic pinning of a vortex core due to the epitaxial growth.

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