FeCr2S4 in magnetic fields: possible evidence for a multiferroic ground state

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dc.contributor.authorBertinshaw, Jen_AU
dc.contributor.authorUlrich, Cen_AU
dc.contributor.authorGünther, Aen_AU
dc.contributor.authorSchrettle, Fen_AU
dc.contributor.authorWohlauer, Men_AU
dc.contributor.authorKrohns, Sen_AU
dc.contributor.authorReehuis, Men_AU
dc.contributor.authorStuder, AJen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorQuach, DVen_AU
dc.contributor.authorGroza, JRen_AU
dc.contributor.authorTsurkan, Ven_AU
dc.contributor.authorLoidl, Aen_AU
dc.contributor.authorDeisenhofer. J.en_AU
dc.date.accessioned2016-06-17T04:45:39Zen_AU
dc.date.available2016-06-17T04:45:39Zen_AU
dc.date.issued2014-08-15en_AU
dc.date.statistics2016-06-15en_AU
dc.description.abstractWe 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. © The Authorsen_AU
dc.identifier.articlenumber6079en_AU
dc.identifier.citationBertinshaw, 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/srep06079en_AU
dc.identifier.govdoc6683en_AU
dc.identifier.issn2045-2322en_AU
dc.identifier.journaltitleScientific Reportsen_AU
dc.identifier.urihttp://www.doi.org/10.1038/srep06079en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/6999en_AU
dc.identifier.volume4en_AU
dc.language.isoenen_AU
dc.publisherNature.comen_AU
dc.subjectThermal analysisen_AU
dc.subjectDielectric materialsen_AU
dc.subjectPolycrystalsen_AU
dc.subjectMagnetic fieldsen_AU
dc.subjectExperiment planningen_AU
dc.subjectNeutronsen_AU
dc.titleFeCr2S4 in magnetic fields: possible evidence for a multiferroic ground stateen_AU
dc.typeJournal Articleen_AU
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