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arXiv · 0707.2765

Magnetic domain fluctuations in an antiferromagnetic film observed with coherent resonant soft x-ray scattering

S. Konings·C. Schuessler-Langeheine·H. Ott·E. Weschke·E. Schierle·H. Zabel·J. B. Goedkoop
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Abstract

We report the direct observation of slow fluctuations of helical antiferromagnetic domains in an ultra-thin holmium film using coherent resonant magnetic x-ray scattering. We observe a gradual increase of the fluctuations in the speckle pattern with increasing temperature, while at the same time a static contribution to the speckle pattern remains. This finding indicates that domain-wall fluctuations occur over a large range of time scales. We ascribe this non-ergodic behavior to the strong dependence of the fluctuation rate on the local thickness of the film.

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S. Konings, C. Schuessler-Langeheine, H. Ott, E. Weschke, E. Schierle, H. Zabel, J. B. Goedkoop. 2011-01-26. Magnetic domain fluctuations in an antiferromagnetic film observed with coherent resonant soft x-ray scattering. https://doi.org/10.1103/physrevlett.106.077402

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