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Combined Arrhenius-Merz Law Describing Domain Relaxation in Type-II Multiferroics

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Komarek,  A. C.
Alexander Komarek, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Stein, J., Biesenkamp, S., Cronert, T., Fröhlich, T., Leist, J., Schmalzl, K., et al. (2021). Combined Arrhenius-Merz Law Describing Domain Relaxation in Type-II Multiferroics. Physical Review Letters, 127(9): 097601, pp. 1-6. doi:10.1103/PhysRevLett.127.097601.


Cite as: https://hdl.handle.net/21.11116/0000-0009-245E-6
Abstract
Electric fields were applied to multiferroic TbMnO3 single crystals to control the chiral domains, and the domain relaxation was studied over 8 decades in time by means of polarized neutron scattering. A surprisingly simple combination of an activation law and the Merz law describes the relaxation times in a wide range of electric field and temperature with just two parameters, an activation-field constant and a characteristic time representing the fastest possible inversion. Over the large part of field and temperature values corresponding to almost 6 orders of magnitude in time, multiferroic domain inversion is thus dominated by a single process, the domain wall motion. Only when approaching the multiferroic transition other mechanisms yield an accelerated inversion.