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arXiv · 1007.5233

Magnetic domain walls displacement : automotion vs. spin-transfer torque

Jean-Yves Chauleau·Raphaël Weil·André Thiaville·Jacques Miltat
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Abstract

The magnetization dynamics equation predicts that a domain wall that changes structure should undergo a displacement by itself - automotion - due to the relaxation of the linear momentum that is associated with the wall structure. We experimentally demonstrate this effect in soft nanostrips,transforming under spin transfer torque a metastable asymmetric transverse wall into a vortex wall. Displacements more than three times as large as under spin transfer torque only are measured for 1~ns pulses. The results are explained by analytical and numerical micromagnetics. Their relevance to domain wall motion under spin transfer torque is emphasized.

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Jean-Yves Chauleau, Raphaël Weil, André Thiaville, Jacques Miltat. 2010-07-29. Magnetic domain walls displacement : automotion vs. spin-transfer torque. https://doi.org/10.1103/physrevb.82.214414

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