Enhancement of ferromagnetism by Co and Ni substitution in the perovskite LaBiMn2O6+d

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dc.creatorKundu, Asish K.
dc.creatorPralong, V.
dc.creatorCaignaert, V.
dc.creatorRao, C. N. R.
dc.creatorRaveau, B.
dc.date2008-01-31
dc.date.accessioned2026-07-07T08:57:32Z
dc.date.available2026-07-07T08:57:32Z
dc.descriptionThe substitution of cobalt and nickel for manganese in the perovskite manganate LaBiMn2O6+d; has been realized, leading to the perovskites LaBiMn2-x(M)xO6+d, with M = Co, Ni and x =0-2/3. In contrast to the literature those phases are found to be orthorhombic with Pnma symmetry. More importantly, it is shown that ferromagnetism is enhanced, TC being increased from 80 K for the parent compound (x = 0) to 97 K for Ni-phase, and to 130 K for the Co-phase. Moreover, a strong competition between ferromagnetism and a glassy-ferromagnetic state in the case of nickel or a spin-glass behaviour in the case of cobalt is observed. These phenomena are interpreted in the frame of a phase separation scenario, where the ferromagnetic Mn4+/Ni2+ and Mn4+/Co2+ interactions reinforce the Mn3+/Mn4+ interactions. These compounds are found to be insulating with a relatively large positive value of thermoelectric power.
dc.description27 pages including table and figures
dc.identifierhttps://arxiv.org/abs/0801.4916
dc.identifierhttp://arxiv.org/abs/0801.4916
dc.identifierJ. Mater. Chem. 17, 3347 (2007)
dc.identifierdoi:10.1039/b710990n
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/147004
dc.subjectMaterials Science
dc.titleEnhancement of ferromagnetism by Co and Ni substitution in the perovskite LaBiMn2O6+d
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