From double exchange to superexchange in charge-ordering perovskite manganites

Wei Bao, J. D. Axe, C. H. Chen, S. W. Cheong, P. Schiffer, M. Roy

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


We found dynamic ferromagnetic correlations at the room temperature in perovskite manganites which have an antiferromagnetic insulating ground state. They are replaced by antiferromagnetic correlations when the electrons order. Our results indicate that the double-exchange mechanism is turned off by electron localization at low temperatures.

Original languageEnglish (US)
Pages (from-to)418-420
Number of pages3
JournalPhysica B: Condensed Matter
StatePublished - 1997
Externally publishedYes

All Science Journal Classification (ASJC) codes

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


  • Charge ordering
  • Colossal magnetoresistance
  • Double exchange
  • Paramagnetic fluctuations


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