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  • Garg, K. B. (author)

Study of Sb substitution for Pr in the Pr0.67Ba0.33MnO3 system

  • Article/chapterEnglish2009

Publisher, publication year, extent ...

  • Elsevier BV,2009
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:uu-107090
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-107090URI
  • https://doi.org/10.1016/j.jmmm.2008.09.011DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • We study the effect of Sb substitution for Pr in the hole-doped system Pr0.67Ba0.33MnO3 (PBMO) for different doping levels of Sb. The two electrical resistivity transitions observed in the pristine sample PBMO shift to low temperatures on Sb doping with an overall increase in the electrical resistivity. The significant local lattice distortion and the grain boundary effects caused by the large cation size mismatch between Pr3+ and Sb3+ suppresses the double-exchange (DE) interaction and enhances the super-exchange (SE) interaction. The compounds show a significant and increasing value of magnetoresistance at temperatures below the Curie temperature, not expected from the DE model. The Curie temperature decreases with increase in Sb content but the saturation magnetization is little affected by the substitution. The spins, however, stay well aligned in the low-temperature regime. Our X-ray near-edge absorption spectra (XANES) and core level photoemission (XPS) data clearly show the Sb cation to be in +3 state and rule out any possibility of e-doping in our compounds.

Subject headings and genre

  • Manganite
  • SQUID
  • X-ray photoemission
  • XANES
  • Magnetoresistance
  • Local lattice distortion
  • PrMnO(3)
  • TECHNOLOGY
  • TEKNIKVETENSKAP

Added entries (persons, corporate bodies, meetings, titles ...)

  • Nordblad, PerUppsala universitet,Fasta tillståndets fysik(Swepub:uu)pno26208 (author)
  • Heinonen, M. (author)
  • Panwar, N. (author)
  • Sen, V. (author)
  • Bondino, F. (author)
  • Magnano, E. (author)
  • Carleschi, E. (author)
  • Parmigiani, F. (author)
  • Agarwal, S. K. (author)
  • Uppsala universitetFasta tillståndets fysik (creator_code:org_t)

Related titles

  • In:Journal of Magnetism and Magnetic Materials: Elsevier BV321:4, s. 305-3110304-88531873-4766

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