期刊
PHYSICAL REVIEW LETTERS
卷 115, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.115.067202
关键词
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资金
- EC's FP7 Program (FP7) [281043 FemtoSpin]
- EPSRC [EP/K000225/1, EP/K031589/1]
- Seagate Technology and Diamond Light Source
- EPSRC Career Acceleration Fellowship [EP/H003487/1]
- EPSRC [EP/H003487/1, EP/K000225/1, EP/K000209/1, EP/K031589/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/K000225/1, EP/K031589/1, EP/H003487/1, EP/K000209/1] Funding Source: researchfish
The dynamics of magnetic vortex cores is of great interest because the gyrotropic mode has applications in spin torque driven magnetic microwave oscillators, and also provides a means to flip the direction of the core for use in magnetic storage devices. Here, we propose a new means of stimulating magnetization reversal of the vortex core by applying a time-varying strain gradient to planar structures of the magnetostrictive material Fe81Ga19 (Galfenol), coupled to an underlying piezoelectric layer. Using micromagnetic simulations we have shown that the vortex core state can be deterministically reversed by electric field control of the time-dependent strain-induced anisotropy.
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