Role of orbital correlation in colossal magnetoresistance

Eiji Saitoh, Y. Tomioka, T. Kimura, Y. Tokura

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Raman scattering has been investigated for a single crystal of Sm1-xSrxMnO3 (x = 0.45), which shows prototypical colossal magnetoresistance (CMR), and related crystals. The emergence of broad phonon bands indicates dynamical charge/orbital correlation above the Curie temperature. Such a feature is systematically enhanced with a decrease of one-electron band width toward the orbital order-disorder phase boundary, being concomitant with the enhancement of CMR. The charge/orbital correlation affected by charge/orbital ordering instability is likely to be responsible for the steep insulator-metal transition and CMR.

Original languageEnglish
Pages (from-to)170-172
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume239
Issue number1-3
DOIs
Publication statusPublished - 2002 Feb 1

Keywords

  • Colossal magnetoresistance
  • Manganese oxides
  • Raman scattering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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