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 language | English |
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Pages (from-to) | 261-264 |
Number of pages | 4 |
Journal | Physica B: Condensed Matter |
Volume | 316-317 |
DOIs | |
Publication status | Published - 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