Current-induced interactions of multiple domain walls in magnetic quantum wires

Details Current-induced interactions of multiple domain walls in magnetic quantum wires Current-induced interactions of multiple domain walls in magnetic quantum wires

2009-05-22

arxiv.org/abs/0905.3644v1

Phys. Rev. B 79, 174422 (2009)

Physics

Condensed Matter

Other Condensed Matter

Published as Phys. Rev. B 79, 174422 (2009)

Scientific paper

10.1103/PhysRevB.79.174422

We show that an applied charge current in a magnetic nanowire containing domain walls (DWs) results in an interaction between DWs mediated by spin-dependent interferences of the scattered carriers. The energy and torque associated with this interaction show an oscillatory behaviour as a function of the mutual DWs orientations and separations, thus affecting the DWs' arrangements and shapes. Based on the derived DWs interaction energy and torque we calculate DW dynamics and uncover potential applications of interacting DWs as a tunable nano-mechanical oscillator. We also discuss the effect of impurities on the DW interaction.

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