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

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

2003-09-05

arxiv.org/abs/cond-mat/0309124v2

Physics

Condensed Matter

Materials Science

Accepted and published in PRL

Scientific paper

10.1103/PhysRevLett.92.077205

Spintronic devices, whose operation is based on the motion of a magnetic domain wall (DW), have been proposed recently. If a DW could be driven directly by flowing an electric current instead of a magnetic field, the performance and functions of such device would be drastically improved. Here we report real-space observation of the current-driven DW motion by using a well-defined single DW in a micro-fabricated magnetic wire with submicron width. Magnetic force microscopy (MFM) visualizes that a single DW introduced in the wire is displaced back and forth by positive and negative pulsed-current, respectively. We can control the DW position in the wire by tuning the intensity, the duration and the polarity of the pulsed-current. It is, thus, demonstrated that spintronic device operation by the current-driven DW motion is possible.

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