Magnetic Reversal on Vicinal Surfaces

Details Magnetic Reversal on Vicinal Surfaces Magnetic Reversal on Vicinal Surfaces

1998-04-01

arxiv.org/abs/cond-mat/9804009v1

Physics

Condensed Matter

Materials Science

12 pages, 8 figures

Scientific paper

10.1103/PhysRevB.58.9276

We present a theoretical study of in-plane magnetization reversal for vicinal ultrathin films using a one-dimensional micromagnetic model with nearest-neighbor exchange, four-fold anisotropy at all sites, and two-fold anisotropy at step edges. A detailed "phase diagram" is presented that catalogs the possible shapes of hysteresis loops and reversal mechanisms as a function of step anisotropy strength and vicinal terrace length. The steps generically nucleate magnetization reversal and pin the motion of domain walls. No sharp transition separates the cases of reversal by coherent rotation and reversal by depinning of a ninety degree domain wall from the steps. Comparison to experiment is made when appropriate.

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