Directional ordering and collective fluctuation of orbital in a colossal magnetoresistive manganite

Eiji Saitoh, Yasuhide Tomioka, Tsuyoshi Kimura, Yoshinori Tokura

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Raman scattering spectra have been investigated for a single crystal of Sm1-xSrxMnO3 (x = 0.45) showing prototypical colossal magnetoresistance (CMR). The emergence of broad phonon bands above the Curie temperature Tc is ascribed to dynamical charge/orbital ordering coupled with local lattice distortion, while concomitant anisotropic diffuse scattering to directional ordering of orbital. The temperature-dependent Raman spectral features can be closely correlated with the resistive and magnetic anomalies as well as the X-ray diffuse scattering peak around Tc of this compound, verifying an important role of the orbital correlation in the CMR.

Original languageEnglish
Pages (from-to)2403-2406
Number of pages4
Journaljournal of the physical society of japan
Volume69
Issue number8
DOIs
Publication statusPublished - 2000 Aug

Keywords

  • Charge/orbital ordering
  • Colossal magnetoresistance (CMR)
  • Manganites
  • Raman scattering

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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