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

研究成果: Article同行評審

34 引文 斯高帕斯(Scopus)

摘要

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.

原文English
文章編號214423
頁(從 - 到)2144231-2144235
頁數5
期刊Physical Review B - Condensed Matter and Materials Physics
65
發行號21
DOIs
出版狀態Published - 2002 6月 1

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學

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