Distinct insulating state below the Curie point in Pr0.7Ba0.3MnO3

A. K. Heilman, Y. Y. Xue, B. Lorenz, B. J. Campbell, J. Cmaidalka, R. L. Meng, Y. S. Wang, C. W. Chu

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

Magnetization, resistivity, thermal expansion, thermopower, and neutron powder diffraction data are presented for the perovskite manganite Pr0.7Ba0.3MnO3. A distinct ferromagnetic insulating state, similar to that observed in the La0.88Sr0.12MnO3 system, is observed in the temperature range between the paramagnetic-ferromagnetic transition at TFM ≈ 180 K and the broad metal-insulator transition near Tp = 120 K. The large A-site cation-size mismatch appears to suppress the ferromagnetic double-exchange interactions relative to the competing ferromagnetic superexchange interactions, thereby giving rise to the ferromagnetic insulating state.

Original languageEnglish
Article number214423
Pages (from-to)2144231-2144235
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number21
DOIs
Publication statusPublished - 2002 Jun 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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