Dynamical pinning of domain wall in magnetic nanowire induced by Walker breakdown

Details Dynamical pinning of domain wall in magnetic nanowire induced by Walker breakdown Dynamical pinning of domain wall in magnetic nanowire induced by Walker breakdown

2008-08-26

arxiv.org/abs/0808.3446v1

Physics

Condensed Matter

Materials Science

17 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.101.207203

Transmission probability of a domain wall through a magnetic nanowire is investigated as a function of the external magnetic field. Very intriguing phenomenon is found that the transmission probability shows a significant drop after exceeding the threshold driving field, which contradicts our intuition that a domain wall is more mobile in the higher magnetic field. The micromagnetics simulation reveals that the domain wall motion in the wire with finite roughness causes the dynamical pinning due to the Walker breakdown, which semi-quantitatively explains our experimental results.

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