ANSTO Publications Online >
Journal Publications >
Journal Articles >

Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/6999

Title: FeCr2S4 in magnetic fields: possible evidence for a multiferroic ground state
Authors: Bertinshaw, J
Ulrich, C
Günther, A
Schrettle, F
Wohlauer, M
Krohns, S
Reehuis, M
Studer, AJ
Avdeev, M
Quach, DV
Groza, JR
Tsurkan, V
Loidl, A
Deisenhofer. J.
Keywords: Thermal analysis
Dielectric materials
Polycrystals
Magnetic fields
Experiment planning
Neutrons
Issue Date: 15-Aug-2014
Publisher: Nature.com
Citation: Bertinshaw, J., Ulrich, C., Günther, A., Schrettle, F., Wohlauer, M., Krohns, S., Reehuis, M., Studer, A. J., Avdeev, M., Quach, D. V., Groza, J. R., Tsurkan. V., Loidl, A., & Deisenhofer, J. (2014). FeCr2S4 in magnetic fields: possible evidence for a multiferroic ground state. Scientific Reports, 4, 6079. doi:10.1038/srep06079
Abstract: We report on neutron diffraction, thermal expansion, magnetostriction, dielectric, and specific heat measurements on polycrystalline FeCr2S4 in external magnetic fields. The ferrimagnetic ordering temperatures TC ≈ 170 K and the transition at TOO ≈ 10 K, which has been associated with orbital ordering, are only weakly shifted in magnetic fields up to 9 T. The cubic lattice parameter is found to decrease when entering the state below TOO. The magnetic moments of the Cr- and Fe-ions are reduced from the spin-only values throughout the magnetically ordered regime, but approach the spin-only values for fields >5.5 T. Thermal expansion in magnetic fields and magnetostriction experiments indicate a contraction of the sample below about 60 K. Below TOO this contraction is followed by a moderate expansion of the sample for fields larger than ~4.5 T. The transition at TOO is accompanied by an anomaly in the dielectric constant. The dielectric constant depends on both the strength and orientation of the external magnetic field with respect to the applied electric field for T < TOO. A linear correlation of the magnetic-field-induced change of the dielectric constant and the magnetic-field dependent magnetization is observed. This behaviour is consistent with the existence of a ferroelectric polarization and a multiferroic ground state below 10 K.
URI: http://www.doi.org/10.1038/srep06079
http://apo.ansto.gov.au/dspace/handle/10238/6999
Appears in Collections:Journal Articles

Files in This Item:

There are no files associated with this item.

Items in APO are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback