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Scanning-electron micrograph of the permalloy wire. Leads are labeled with L1 and L2.
Eight measurements for the dependence of the magnetoresistance of the wire on the magnetic field in -direction. Prior to the measurement a domain wall has been generated in the curvature of the wire. One curve (gray) shows a different depinning field.
Depinning probability of a head-to-head wall for (a) different external magnetic fields and pulse-rise times and a constant current density of . The pulse width is 10 ns. (b) Depinning probability for different pulse amplitudes and pulse-rise times with a constant pulse width of 10 ns and magnetic field of . Inset of (a) shows the definition of the pulse parameters. is the rise time, is the pulse length, and is the pulse amplitude.
Acceleration of a domain wall with a damping time of 8 ns due to different pulse shapes. The width is 10 ns for all pulses. The rise time is 2 ns for (c) and (d) and 10 ns for (a) and (b). The current density is for (a) and (c) and for (b) and (d).
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