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arXiv · 1506.00723

Current-Driven Motion of Magnetic Domain Wall with Many Bloch Lines

Junichi Iwasaki·Naoto Nagaosa
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Abstract

The current-driven motion of a domain wall (DW) in a ferromagnet with many Bloch lines (BLs) via the spin transfer torque is studied theoretically. It is found that the motion of BLs changes the current-velocity ($j$-$v$) characteristic dramatically. Especially, the critical current density to overcome the pinning force is reduced by the factor of the Gilbert damping coefficient $\alpha$ even compared with that of a skyrmion. This is in sharp contrast to the case of magnetic field driven motion, where the existence of BLs reduces the mobility of the DW.

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Junichi Iwasaki, Naoto Nagaosa. 2015-06-02. Current-Driven Motion of Magnetic Domain Wall with Many Bloch Lines. https://doi.org/10.7566/jpsj.84.083701

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