Regensburg 2019 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 11: Multiferroics and Magnetoelectric coupling I (joint session MA/KFM)

KFM 11.5: Vortrag

Dienstag, 2. April 2019, 15:15–15:30, H37

Multiferroic domain inversion in NaFeGe₂O₆ — •Sebastian Biesenkamp¹, Dmitry Gorkov¹, Tobias Fröhlich¹, Jonas Stein¹, Karin Schmalzl², Wolfgang Schmidt², Yvan Sidis³, and Markus Braden¹ — ¹Institute of Physics II, University of Cologne — ²JCNS at ILL, Grenoble — ³Laboratoire Léon Brillouin, CEA-CNRS, CEA/Saclay

Multiferroic materials attracted a considerable interest during the last decade, as the electric control of chiral magnetism implies a promising potential of applicability in the field of data storage devices or sensors. Fundamentally for all kind of applications is the knowledge of the relaxation times of multiferroic domain inversion, when switching applied external electric fields. Here we report time-resolved neutron scattering studies of the relaxations times in the multiferroic pyroxene NaFeGe₂O₆. They can be followed over a broad timescale, ranging from microseconds to several minutes and we found that the temperature and electric field dependence of the rise-times can be well described by a simple activation and Merz’s law respectively.