Skyrmion elongation, duplication, and rotation by spin-transfer torque under spatially varying spin current

被引：1
|
作者：
van Duijn, Floris [1 ,2 ]
Osca, Javier [1 ,2 ]
Soree, Bart [1 ,2 ,3 ]
机构：
[1] IMEC, Kapeldreef 75, B-3001 Leuven, Belgium
[2] Katholieke Univ Leuven, ESAT MICAS, Kasteelpk Arenberg 10, B-3001 Leuven, Belgium
[3] Univ Antwerp, Dept Fys, B-2000 Antwerp, Belgium
来源：
PHYSICAL REVIEW B | 2021年 / 104卷 / 09期
基金：
欧盟地平线“2020”;
关键词：
Current pulse - Damping coefficients - Frequency ranges - GHz frequencies - Short-pulse - Skyrmions - Spin currents - Spin transfer torque - Splittings;
D O I：
10.1103/PhysRevB.104.094426
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of the spatially varying spin current on a skyrmion is numerically investigated. It is shown that an inhomogeneous current density induces an elongation of the skyrmion. This elongation can be controlled using current pulses of different strength and duration. Long current pulses lead to a splitting that forms two replicas of the initial skyrmion while for short pulses the elongated skyrmion relaxes back to its initial circular state through rotation in the MHz-GHz frequency range. The frequency is dependent on the strength of the damping coefficient.
引用
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页数：6
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