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

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

Research output: Contribution to journalArticlepeer-review

1 Citation (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.

Original languageEnglish
Pages (from-to)707-710
Number of pages4
JournalPhysica C: Superconductivity and its applications
Issue numberPART 3
Publication statusPublished - 2000

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


Dive into the research topics of 'Field-Induced Crossover in La0,7Pb0.3MnO3'. Together they form a unique fingerprint.

Cite this