High-temperature charge-ordering fluctuation in manganites

K. H. Kim, M. Uehara, S. W. Cheong

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57 Scopus citations

Abstract

High-temperature (T) studies of La1-xCaxMnO3 show that charge and phonon transport is significantly suppressed in a narrow doping region of x≈1/2 and in a wide T range up to 900 K, which accompanies anomalous broadening of x-ray Bragg peaks. Contrarily, ferromagnetic (FM) correlation above Curie T is sharply enhanced at x≈3/8. All these observations indicate the presence of short-range charge ordering (CO) correlation at high T, possibly in the form of a FM "zigzag," a small segment of the CE-type CO state. The decoupling and coupling of the FM zigzags for x≈3/8 and 1/2, respectively, is consistent with our results.

Original languageEnglish (US)
Article number0R1194
Pages (from-to)R11945-R11948
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume62
Issue number18
DOIs
StatePublished - Nov 1 2000

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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