Distribution of magnetic domain pinning fields in GaMnAs ferromagnetic films

Details Distribution of magnetic domain pinning fields in GaMnAs ferromagnetic films Distribution of magnetic domain pinning fields in GaMnAs ferromagnetic films

2008-03-05

arxiv.org/abs/0803.0714v1

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevB.78.075309

Using the angular dependence of the planar Hall effect in GaMnAs ferromagnetic films, we were able to determine the distribution of magnetic domain pinning fields in this material. Interestingly, there is a major difference between the pinning field distribution in as-grown and in annealed films, the former showing a strikingly narrower distribution than the latter. This conspicuous difference can be attributed to the degree of non-uniformity of magnetic anisotropy in both types of films. This finding provides a better understanding of the magnetic domain landscape in GaMnAs that has been the subject of intense debate.

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