Electronic and magnetic instability in Pr0.65Ca 0.25Sr0.1MnO3

S. Mollah, H. L. Huang, S. J. Liu, P. L. Ho, W. L. Huang, C. W. Huang, C. P. Sun, Jiunn-Yuan Lin, Y. S. Gou, W. H. Li, H. D. Yang*

*Corresponding author for this work

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

Electronic and magnetic instability in polycrystalline Pr 0.65Ca0.25Sr0.1MnO3 manganite has been established from a systematic study of resistivity (ρ), magnetization (M) and specific heat (C). The sample shows a charge ordering transition at TCO ∼ 200 K, an antiferromagnetic (AFM) ordering transition at TN ∼ 175 K, a metal-insulator (MI) transition at TMI ∼ 80 K and an unusual magnetic ordering transition at TM * ∼ 45 K in the absence of magnetic fields. Though the C data do not show any anomaly at TMI for MI transition, these illustrate a much smaller anomaly than expected one at TM * and is suppressed by magnetic fields. This indicates that the unusual magnetic ordering in this sample is of canted, fluctuated or phase separation of AFM and ferromagnetic in nature which is established from the T-H phase diagram, as well as the thermal and magnetic hysteresis in ρ, M and C.

Original languageEnglish
Pages (from-to)215-221
Number of pages7
JournalJournal of Magnetism and Magnetic Materials
Volume265
Issue number2
DOIs
StatePublished - 1 Sep 2003

Keywords

  • CMR
  • Manganites
  • Phase instability

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