Magnetodielectric coupling in Mn3O4

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dc.creatorTackett, R.
dc.creatorLawes, G.
dc.creatorMelot, B. C.
dc.creatorGrossman, M.
dc.creatorToberer, E. S.
dc.creatorSeshadri, R.
dc.date2007-03-26
dc.date.accessioned2026-07-07T08:36:29Z
dc.date.available2026-07-07T08:36:29Z
dc.descriptionWe have investigated the dielectric anomalies associated with spin ordering transitions in the tetragonal spinel Mn$_3$O$_4$, using thermodynamic, magnetic, and dielectric measurements. We find that two of the three magnetic ordering transitions in Mn$_3$O$_4$ lead to decreases in the temperature dependent dielectric constant at zero applied field. Applying a magnetic field to the polycrystalline sample leaves these two dielectric anomalies practically unchanged, but leads to an increase in the dielectric constant at the intermediate spin-ordering transition. We discuss possible origins for this magnetodielectric behavior in terms of spin-phonon coupling. Band structure calculations suggest that in its ferrimagnetic state, Mn$_3$O$_4$ corresponds to a semiconductor with no orbital degeneracy due to strong Jahn-Teller distortion.
dc.description6 pages, 7 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0703685
dc.identifierhttp://arxiv.org/abs/cond-mat/0703685
dc.identifierPhys. Rev. B 76, 024409 (2007) (6 pages)
dc.identifierdoi:10.1103/PhysRevB.76.024409
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/140078
dc.subjectMaterials Science
dc.titleMagnetodielectric coupling in Mn3O4
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