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Phys Rev Lett. 2004 Feb 20;92(7):077205. Epub 2004 Feb 19.

Real-space observation of current-driven domain wall motion in submicron magnetic wires.

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Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan.


We report direct observation of current-driven magnetic domain wall (DW) displacement by using a well-defined single DW in a microfabricated magnetic wire with submicron width. Magnetic force microscopy visualizes that a single DW introduced in a wire is displaced back and forth by positive and negative pulsed current, respectively. The direct observation gives quantitative information on the DW displacement as a function of the intensity and the duration of the pulsed current. The result is discussed in terms of the spin-transfer mechanism.

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