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 byspin-polarised pulse current introduces a promising concept for thereliable addressing of a single nanodisc element inside densearrays. In this paper, micromagnetic simulations are employed tostudy the vortex core switching behaviour excited by a shortin-plane Gaussian current pulse. We find that both the switchingmechanism and the switching time are not sensitive to changes inthe phenomenological parameters of spin-torque nonadiabaticity andGilbert damping. The switching time, however, strongly depends onthe current strength. In addition, we have theoretically predictedthe parameter range of current pulses to achieve a singleswitching event. |
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| Keywords: | magnetic vortex spin torque micromagneticsimulation |
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