Ballistic current induced effective force on magnetic domain wall

C. Wang; K. Xia

doi:10.1007/BF03353604

Issue

Vol. 1 No. 1 (2009)

Issue Published : Sep 1, 2009

Ballistic current induced effective force on magnetic domain wall

https://doi.org/10.1007/BF03353604

C. Wang

Department of Physics, Beijing Normal University, Beijing 100875, China

K. Xia

Department of Physics, Beijing Normal University, Beijing 100875, China

Corresponding Author: K. Xia

kexia@bnu.edu.cn

Nano-Micro Letters, Vol. 1 No. 1 (2009), Article Number: 34-39
Article Published : Dec 20, 2009

Abstract

The collective dynamics of magnetic domain wall under electric current is studied in the form of spin transfer torque (STT). The out-of-plane STT induced effective force is obtained based on the Landau-Lifshitz-Gilbert (LLG) equation including microscopic STT terms. The relation between microscopic calculations and collective description of the domain wall motion is established. With our numerical calculations based on tight binding free electron model, we find that the non adiabatic out-of-plane torque components have considerable non-local properties. It turns out that the calculated effective forces decay significantly with increasing domain wall widths.

Keywords

Magnetic domain Spin Transfer torque Spintronics First principle study

Wang, C., and K. Xia. 2009. “Ballistic Current Induced Effective Force on Magnetic Domain Wall”. Nano-Micro Letters 1 (1):34-39. https://doi.org/10.1007/BF03353604.

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References

S. A. Wolf, D. D. Awschalom, R.A. Buhrman, J. M. Daughton and S. Von Molnar, Science 294, 1488 (2001); I. Zutic, J. Fabian and S. Das Sarma, Rev. Mod. Phys. 76, 2 (2004).

Berger, Phys. Rev. B 54, 9353 (1996). doi:10.1103/PhysRevB.54.9353

J. Slonczewski and J. Magn. Magn. Mater. 159, L1 (1996). doi:10.1016/0304-8853(96)00062-5

G. S. D. Beach, C. Knutson, C. Nistor, M. Tsoi and J. L. Erskine, Phys. Rev. Lett. 97, 057203 (2006). doi:10.1103/PhysRevLett.97.057203

M. Tsoi, Nature Phys. 4, 17 (2008). doi:10.1038/nphys822

J. C. Sankey, P. M. Braganca, A. G. F. Garcia, I. N. Krivorotov, R. A. Buhrman and D. C. Ralph, Phys. Rev. Lett. 96, 227601 (2006). doi:10.1103/PhysRevLett.96.227601

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J. Shibata, G. Tarara and H. Kohno, Phys. Rev. Lett. 94, 076601 (2005). doi:10.1103/PhysRevLett.94.076601

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Z. Li and S. Zhang, Phys. Rev. Lett. 93, 127204 (2004). doi:10.1103/PhysRevLett.93.127204

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J. Xiao, A. Zangwill and M. D. Stiles, Phys. Rev. B. 73, 054428 (2006). doi:10.1103/PhysRevB.73.054428

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S. Wang, Y. Xu and K. Xia, Phys. Rev. B 77, 184430 (2008). doi:10.1103/PhysRevB.77.184430

N. L. Schryer and L. R. Walker, J. Appl. Phys. 45, 5406 (1974). doi:10.1063/1.1663252

X. R. Wang, P. Yan, J. Lu and C. He, Ann. Phys. 324, 8 (2009). doi:10.1016/j.aop.2009.05.004