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Spin-transfer torque induced reversal in magnetic domains

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  • Murugesh, S.
  • Lakshmanan, M.

Abstract

Using the complex stereographic variable representation for the macrospin, from a study of the nonlinear dynamics underlying the generalized Landau–Lifshitz (LL) equation with Gilbert damping, we show that the spin-transfer torque is effectively equivalent to an applied magnetic field. We study the macrospin switching on a Stoner particle due to spin-transfer torque on application of a spin-polarized current. We find that the switching due to spin-transfer torque is a more effective alternative to switching by an applied external field in the presence of damping. We demonstrate numerically that a spin-polarized current in the form of a short pulse can be effectively employed to achieve the desired macrospin switching.

Suggested Citation

  • Murugesh, S. & Lakshmanan, M., 2009. "Spin-transfer torque induced reversal in magnetic domains," Chaos, Solitons & Fractals, Elsevier, vol. 41(5), pages 2773-2781.
    • Handle: RePEc:eee:chsofr:v:41:y:2009:i:5:p:2773-2781
    DOI: 10.1016/j.chaos.2008.10.018
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    References listed on IDEAS

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    1. I. Tudosa & C. Stamm & A. B. Kashuba & F. King & H. C. Siegmann & J. Stöhr & G. Ju & B. Lu & D. Weller, 2004. "The ultimate speed of magnetic switching in granular recording media," Nature, Nature, vol. 428(6985), pages 831-833, April.
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