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Structural, Electronic, and Magnetic Characterization of the Perovskite LaNi1−xTixO3 (0≤x≤12)

✍ Scribed by E Rodrı́guez; I Álvarez; M.L López; M.L Veiga; C Pico

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
168 KB
Volume
148
Category
Article
ISSN
0022-4596

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✦ Synopsis

DEDICATED TO PROFESSOR M. GAITA D N ON THE OCCASION OF HIS 70TH BIRTHDAY Structural, electronic, and magnetic behavior of the LaNi 1؊x Ti x O 3 (04x4 1

2 ) perovskite-like system is reported. These phases can be regarded as derived from LaNiO 3 by partial substitution of Ni 3؉ by Ti 4؉ cations that produces a partial reduction of Ni 3؉ to Ni 2؉ . X-ray powder di4raction data were analyzed by the Rietveld method, and rhombohedral (S.G. R3 c) or orthorhombic (S.G. Pbnm) symmetry were found depending on the degree of substitution, x. Conductivity and Seebeck measurements show the presence of metal to insulator (M+I) transitions in these oxides and the di4erent nature of the carriers. Magnetic susceptibility measurements indicate important electronic delocalization that is mainly controlled by composition.

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