Dependence of the vortex formation process on the perpendicular magnetic anisotropy constant in perpendicular magnetic tunnel junctions

We investigate the dependence of the vortex formation process on the perpendicular magnetic anisotropy (PMA) constant in a perpendicular magnetic tunnel junction using micromagnetic simulations. Based on the different precession trajectories of magnetic moments, the formation process of a vortex can...

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Bibliographic Details
Published inJapanese Journal of Applied Physics Vol. 58; no. 1; pp. 10911 - 10915
Main Authors Yang, Maosen, Fang, Liang, Chi, Yaqing
Format Journal Article
LanguageEnglish
Published Tokyo IOP Publishing 01.01.2019
Japanese Journal of Applied Physics
Subjects
Computer simulation
Dependence
Magnetic anisotropy
Magnetic moments
Precession
Tunnel junctions
Vortices
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Summary:We investigate the dependence of the vortex formation process on the perpendicular magnetic anisotropy (PMA) constant in a perpendicular magnetic tunnel junction using micromagnetic simulations. Based on the different precession trajectories of magnetic moments, the formation process of a vortex can be divided into two different models: the first includes horizontal precession and damped oscillation, and the second includes damped oscillation only. The time of vortex formation has a nonmonotonic relationship with the PMA constant. By analyzing the variation trend of energies within the system, the underlying physical mechanism of the dependence of the vortex formation process on PMA constant is revealed.
Bibliography:JJAP-100043
ISSN:0021-4922
1347-4065
DOI:10.7567/1347-4065/aaf0a7