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dc.contributor.authorSaha, Rana
dc.contributor.authorFauth, Francois
dc.contributor.authorAvdeev, Maxim
dc.contributor.authorKayser, Paula
dc.contributor.authorKennedy, Brendan J.
dc.contributor.authorSundaresan, A.
dc.date.accessioned2017-01-24T06:24:58Z-
dc.date.available2017-01-24T06:24:58Z-
dc.date.issued2016
dc.identifier.citationSaha, R.; Fauth, F.; Avdeev, M.; Kayser, P.; Kennedy, B. J.; Sundaresan, A., Magnetodielectric effects in A-site cation-ordered chromate spinels LiMCr4O8 (M = Ga and In). Physical Review B 2016, 94 (6), 9 http://dx.doi.org/10.1103/PhysRevB.94.064420en_US
dc.identifier.citationPhysical Review Ben_US
dc.identifier.citation94en_US
dc.identifier.citation6en_US
dc.identifier.issn2469-9950
dc.identifier.urihttp://hdl.handle.net/10572/2142-
dc.descriptionRestricted Accessen_US
dc.description.abstractWe report the occurrence of a magnetodielectric effect and its correlation with structure and magnetism in the A-site ordered chromate spinel oxides LiMCr4O8 (M = Ga, In). In addition to magnetic and dielectric measurements, temperature dependent synchrotron and neutron diffraction experiments have been carried out for the Ga compound. The results are compared and contrasted with that of a corresponding conventional B-site magnetic chromate spinel oxide, ZnCr2O4. Like ZnCr2O4, the A-site ordered chromate spinels exhibit a magnetodielectric effect at the magnetic ordering temperature (T-N similar to 13-15 K), resulting from magnetoelastic coupling through a spin Jahn-Teller effect. While the presence of a broad magnetic anomaly, associated with a short-range magnetic ordering (T-SO similar to 45 K) in ZnCr2O4, does not cause any dielectric anomaly, a sharp change in dielectric constant has been observed in LiInCr4O8 at the magnetic anomaly, which is associated with the opening of a spin gap (T-SG similar to 60 K). Contrary to the In compound, a broad dielectric anomaly exists at the onset of short-range antiferromagnetic ordering (T-SO similar to 55 K) in LiGaCr4O8. The differences in dielectric behavior of these compounds have been discussed in terms of breathing distortion of the Cr-4 tetrahedra.en_US
dc.description.uri2469-9969en_US
dc.description.urihttp://dx.doi.org/10.1103/PhysRevB.94.064420en_US
dc.language.isoEnglishen_US
dc.publisherAmerican Physical Societyen_US
dc.rights@American Physical Society, 2016en_US
dc.subjectPhysicsen_US
dc.subjectPowder Diffractionen_US
dc.subjectPhase-Transitionen_US
dc.subjectOxidesen_US
dc.titleMagnetodielectric effects in A-site cation-ordered chromate spinels LiMCr4O8 (M = Ga and In)en_US
dc.typeArticleen_US
Appears in Collections:Research Articles (Sundaresan A.)

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