title: Magnetic domain fluctuations in an antiferromagnetic film observed with coherent resonant soft x-ray scattering.
abstract: We report the direct observation of slow fluctuations of helical antiferromagnetic domains in an ultrathin 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 nonergodic behavior to the strong dependence of the fluctuation rate on the local thickness of the film.
authors.affiliation: Van der Waals-Zeeman Institute, University of Amsterdam, The Netherlands.
authors.forename: S
authors.initials: S
authors.lastname: Konings
authors.forename: C
authors.initials: C
authors.lastname: Schüssler-Langeheine
authors.forename: H
authors.initials: H
authors.lastname: Ott
authors.forename: E
authors.initials: E
authors.lastname: Weschke
authors.forename: E
authors.initials: E
authors.lastname: Schierle
authors.forename: H
authors.initials: H
authors.lastname: Zabel
authors.forename: J B
authors.initials: JB
authors.lastname: Goedkoop