Abstract
We have studied the motion of a magnetic domain wall (MDW) driven by a magnetic field H in a 2D ultrathin Pt/Co/Pt film showing perpendicular anisotropy and quenched disorder. MDW velocity measurements down to the so called creep regime show that the average energy barrier scales as with and that the correlation function along a MDW is governed by a wandering exponent , in very good agreement with theories giving and . This is the first direct measurement of the creep regime for a moving interface in a disordered medium.
- Received 5 August 1997
DOI:https://doi.org/10.1103/PhysRevLett.80.849
©1998 American Physical Society