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Skyrmion dynamics and stability in magnetic nanowire

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Abstract

Skyrmions are the smallest stable magnetic textures and they could be considered ideal elements for ultra-dense magnetic memories. The size and the speed of the skyrmions are crucial characteristics for their proper functionality. In this study, the modified Landau–Lifshitz–Gilbert formalism is carried out to understand the correlation between the physical properties and skyrmion performances such as stability, size and motion speed. The magnetic anisotropy, Dzyaloshinskii–Moriya interaction, exchange coupling and saturation magnetization are varied and magnetization dynamics is evaluated. It is found that all parameters mentioned can affect the speed and dimension of the skyrmion. The calculations are conducted using nanosecond pulsed current. In summary, a phase diagram combining several parameters is established, which could define the optimal conditions for achieving small-sized skyrmions that can be displaced with high velocity.

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Acknowledgements

The authors would like to acknowledge the support from HMTF Strategic Research of Oman (grant no. SR/SCI/PHYS/20/01).

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  1. College of Science, Department of Physics, Sultan Qaboos University, PC 123, P.O. Box 36, Muscat, Oman

    S. Al Naabi & R. Sbiaa

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Naabi, S.A., Sbiaa, R. Skyrmion dynamics and stability in magnetic nanowire. Appl. Phys. A 128, 1059 (2022). https://doi.org/10.1007/s00339-022-06211-7

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