Surface spin-flop phases and bulk discommensurations in antiferromagnets

Details Surface spin-flop phases and bulk discommensurations in antiferromagnets Surface spin-flop phases and bulk discommensurations in antiferromagnets

1996-12-09

arxiv.org/abs/cond-mat/9612083v1

Physics

Condensed Matter

4 pages, RevTeX, 2 Postscript figures

Scientific paper

10.1088/0305-4470/30/8/006

Phase diagrams as a function of anisotropy D and magnetic field H are obtained for discommensurations and surface states for a model antiferromagnet in which $H$ is parallel to the easy axis. The surface spin-flop phase exists for all $D$. We show that there is a region where the penetration length of the surface spin-flop phase diverges. Introducing a discommensuration of even length then becomes preferable to reconstructing the surface. The results are used to clarify and correct previous studies in which discommensurations have been confused with genuine surface spin-flop states.

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