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ChemInform Abstract: New Fe3+/Cr3+ Perovskites with Anomalous Transport Properties: The Solid Solution LaxBi1-xFe0.5Cr0.5O3 (0.4 ≤ x ≤ 1).

✍ Scribed by M. E. Villafuerte-Castrejon; M. Garcia-Guaderrama; L. Fuentes; J. Prado-Gonjal; A. M. Gonzalez; M. A. de la Rubia; M. Garcia-Hernandez; E. Moran

Publisher: John Wiley and Sons
Year: 2011
Weight: 23 KB
Volume: 42
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.201144008

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✦ Synopsis

xFe0.5Cr0.5O3 (0.4 ≤ x ≤ 1). -The title solid solution is synthesized by calcination of a gel (900 °C, 12 h) obtained from a mixture of Bi(NO3)3, La(NO3)3, Fe(NO3)3, Cr(NO3)3, and 2-methoxyethanol. The samples are characterized by powder XRD, SAED, SEM, and electrical and magnetic measurements. They crystallize with a perovskite-type structure in the orthorhombic space group Pbnm, and exhibit a positive temperature coefficient for the resistivity at temperatures between 270 and 400 °C. For all the samples, zero-field-cooling curves appear above field-cooling ones, an anomalous feature that is interpreted as being due to complex ferromagnetic/antiferromagnetic interactions in the B perovskite sublattice. -

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