Dynamics of magnetic domain wall motion after nucleation: Dependence on the wall energy

Details Dynamics of magnetic domain wall motion after nucleation: Dependence on the wall energy Dynamics of magnetic domain wall motion after nucleation: Dependence on the wall energy

2006-02-07

arxiv.org/abs/cond-mat/0602174v1

Physics

Condensed Matter

Other Condensed Matter

Accepted for publication in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.96.097204

The dynamics of magnetic domain wall motion in the FeNi layer of a FeNi/Al2O3/Co trilayer has been investigated by a combination of x-ray magnetic circular dichroism, photoelectron emission microscopy, and a stroboscopic pump-probe technique. The nucleation of domains and subsequent expansion by domain wall motion in the FeNi layer during nanosecond-long magnetic field pulses was observed in the viscous regime up to the Walker limit field. We attribute an observed delay of domain expansion to the influence of the domain wall energy that acts against the domain expansion and that plays an important role when domains are small.

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