Magneto-transport and Magneto-dielectric effect in Bi-based Perovskite Manganites

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dc.creatorKundu, Asish K.
dc.creatorRanjith, R.
dc.creatorPralong, V.
dc.creatorCaignaert, V.
dc.creatorRaveau, B.
dc.date2008-01-25
dc.date2008-09-04
dc.date.accessioned2026-07-07T10:00:08Z
dc.date.available2026-07-07T10:00:08Z
dc.descriptionThe effect of cobalt and nickel substitutions for manganese on the physical properties of the perovskite manganite La1.2Bi0.8Mn2-x(Ni/Co)xO6+d, with x = 0.0-0.8, has been investigated. It is observed that the ferromagnetism is enhanced, TC being increased from 103 K for the parent compound (x = 0.0) to 178 K for Ni-phase, and to 181 K for the Co-phase (x = 0.8). Moreover, the systems remain insulating and depict relatively large values of magnetoresistance effect at low temperatures (up to 67 % at 90K and 70 kOe, for x = 0.0 phase). These phenomena are interpreted by means of electronic phase separation, where the ferromagnetic Mn4+/Ni2+ and Mn4+/Co2+ interactions reinforce the Mn3+/Mn4+ interactions by super-exchange interaction. The dielectric measurements below the magnetic transition temperatures exhibit weak magneto-dielectric effect of around 0.25% at 80K, which may be due to spin-lattice interaction.
dc.description34 pages, parts of the work is published in JMC
dc.identifierhttps://arxiv.org/abs/0801.3981
dc.identifierhttp://arxiv.org/abs/0801.3981
dc.identifierJ. Mater. Chem. 18, 4280 (2008)
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/168251
dc.subjectMaterials Science
dc.subjectStrongly Correlated Electrons
dc.titleMagneto-transport and Magneto-dielectric effect in Bi-based Perovskite Manganites
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