Transport behavior of yttrium substituted polycrystalline La0.7Pb0.3MnO3

C. H. Lin, S. L. Young, H. Z. Chen, C. R. Ou, M. C. Kao, Lance Horng

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Abstract

The transport properties in La0.7-xYxPb0.3MnO3 (0.0 ≤ x ≤ 0.2) is investigated. The substitution of La3+ ions by smaller nonmagnetic Y3+ leads to greater spin disorder and induces variations in the magnetotransport behavior. From resistivity versus temperature curves a metal-insulator transition phenomenon is observed at the transition temperature, TP, decreases as the Y content increases. The resistivity is well fitted using the equation ρ(T) = ρnexp[(T*/T)n] with n = 1/4 and n = 1/2 at high and intermediate temperatures, respectively. The characteristic temperature T* varies with Y content in a manner consistent with the localization model of variable range hopping. Below TP, resistivity varies as a function of power law contributions, ρ = ρ0 + ρ2T2 + ρ5/2T5/2, corresponding to the electron scattering processes in the ferromagnetic phase.

Original languageEnglish
Pages (from-to)5290-5291
Number of pages2
JournalJournal of Non-Crystalline Solids
Volume354
Issue number47-51
DOIs
Publication statusPublished - 2008 Dec 1

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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