Nonadiabatic spin-torque and damping effects on vortex core switching triggered by a single current pulse |
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Authors: | Jin Wei and Liu Yao-Wen |
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Affiliation: | Department of Physics and Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Tongji University, Shanghai 200092, China; College of Physics and Communication Electronics, Anhui Normal University, Wuhu 241000, China |
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Abstract: | Switching the orientation of a vortex core by
spin-polarised pulse current introduces a promising concept for the
reliable addressing of a single nanodisc element inside dense
arrays. In this paper, micromagnetic simulations are employed to
study the vortex core switching behaviour excited by a short
in-plane Gaussian current pulse. We find that both the switching
mechanism and the switching time are not sensitive to changes in
the phenomenological parameters of spin-torque nonadiabaticity and
Gilbert damping. The switching time, however, strongly depends on
the current strength. In addition, we have theoretically predicted
the parameter range of current pulses to achieve a single
switching event. |
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Keywords: | magnetic vortex spin torque micromagnetic
simulation |
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