Thermal diffusivity of La1-XCaXMnO3 up to 1200 K

Hiroyuki Fujishiro, Manabu Ikebe, Takaya Akashi, Takashi Goto

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The thermal diffusivity α(T) and the normalized specific heat C(T)/C(300 K) of the colossal magnetoresistive manganite, La1-XCaXMnO3 (LCMO; 0≤X≤1.0), were measured in the temperature range from 10 to 1200 K. At high temperatures above 300 K, the temperature differential of the diffusivity, dα/dT, changes from negative to positive with increasing Ca concentration X. The positive dα/dT coefficient is not standard and a possible origin correlated with the local distortion around the Jahn-Teller active Mn3+ ions is proposed. The phase diagram of the LCMO system is completed up to 1200 K using the anomalies of α(T), C(T) and other physical quantities.

Original languageEnglish
Pages (from-to)261-264
Number of pages4
JournalPhysica B: Condensed Matter
Volume316-317
DOIs
Publication statusPublished - 2002 May 1

Keywords

  • LaCaMnO
  • Laser flush method
  • Phase diagram
  • Specific heat
  • Thermal diffusivity

ASJC Scopus subject areas

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

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