Effects of site substitution and metal ion addition on doped manganites

A. K. Pradhan, Y. Feng, B. K. Roul, D. R. Sahu, M. Muralidhar

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Abstract

We report transport, magnetization and transmission electron microscopy studies of the effects of A- and B-site substitution, and the addition of metal ions such as Pt, Ag, and Sr, on doped ABO3 perovskites, where A = La, Pr etc and B = Mn. Disorder induced by such substitution changes the behaviour of the charge-ordered (CO) state significantly. A- and B-site substitution suppresses the CO phase due to size mismatch and disorder produced by inhomogeneity. On the other hand, addition of metal ions such as Pt and Ag improves several colossal-magnetoresistance properties significantly due to microstructural effects and enhanced current percolation through grain boundaries.

Original languageEnglish
Pages (from-to)10323-10329
Number of pages7
JournalJournal of Physics Condensed Matter
Volume14
Issue number43
DOIs
Publication statusPublished - 2002 Nov 4

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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