Probing charge/orbital correlation in La1.2Sr1.8Mn2O7 by Raman spectroscopy

Ki Ichi Yamamoto, Tsuyoshi Kimura, Tadahiko Ishikawa, Takuro Katsufuji, Yoshinori Tokura

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Raman spectra have been investigated for a single crystal of La1.2Sr1.8Mn2O7 that shows colossal magnetoresistance around the Curie temperature Tc = 126K. Several broad phonon peaks grow with decrease of temperature down to TC but disappear below TC, which can be clearly ascribed to a change in the charge/orbital correlation by comparison with the spectra for the charge/orbital ordered states of the layered manganites (La0.5Sr1.5MnO4 and LaSr2Mn2O7). Such a real-space charge density fluctuation is also observed to cause the low-energy diffuse Raman response, the B1g component of which is critically suppressed below TC as well.

Original languageEnglish
Pages (from-to)2538-2541
Number of pages4
JournalJournal of the Physical Society of Japan
Volume68
Issue number8
Publication statusPublished - 1999 Aug
Externally publishedYes

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Raman spectroscopy
orbitals
Curie temperature
space charge
Raman spectra
causes
single crystals
temperature
energy

Keywords

  • Charge/orbital ordering
  • Colossal magnetoresistance (CMR)
  • LaSrMnO
  • Layered manganites
  • Raman scattering

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Probing charge/orbital correlation in La1.2Sr1.8Mn2O7 by Raman spectroscopy. / Yamamoto, Ki Ichi; Kimura, Tsuyoshi; Ishikawa, Tadahiko; Katsufuji, Takuro; Tokura, Yoshinori.

In: Journal of the Physical Society of Japan, Vol. 68, No. 8, 08.1999, p. 2538-2541.

Research output: Contribution to journalArticle

Yamamoto, KI, Kimura, T, Ishikawa, T, Katsufuji, T & Tokura, Y 1999, 'Probing charge/orbital correlation in La1.2Sr1.8Mn2O7 by Raman spectroscopy', Journal of the Physical Society of Japan, vol. 68, no. 8, pp. 2538-2541.
Yamamoto, Ki Ichi ; Kimura, Tsuyoshi ; Ishikawa, Tadahiko ; Katsufuji, Takuro ; Tokura, Yoshinori. / Probing charge/orbital correlation in La1.2Sr1.8Mn2O7 by Raman spectroscopy. In: Journal of the Physical Society of Japan. 1999 ; Vol. 68, No. 8. pp. 2538-2541.
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