Field-Induced Crossover in La0,7Pb0.3MnO3

A. K. Heilman, Y. Y. Xue, B. Lorenz, M. Gospodinov, S. G. Dobreva, C. W. Chu

研究成果: Article同行評審

1 引文 斯高帕斯(Scopus)


A field-induced crossover is observed both resistively and magnetically in a single crystal of La0.7Pb0.3MnO3, a compound that exhibits colossal magnetoresistance (CMR) and has a second-order ferromagnetic transition. The resistivity (p) data observed in high magnetic fields show a universal decrease with the magnetization (M) and little dependence on temperature. In contrast, p is independent of M for lower fields. An analysis of the magnetization data finds that the critical exponents have different values depending on whether the high field data or the low field data are analyzed. The results are consistent with the interpretation that at low fields, the compound behaves as a collection of magnetic clusters with mean-field-like inter-cluster interactions, and at high fields the compound behaves as a system of individual spins with short-range interactions.

頁(從 - 到)707-710
期刊Physica C: Superconductivity and its applications
發行號PART 3
出版狀態Published - 2000

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學
  • 能源工程與電力技術
  • 電氣與電子工程


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