Temperature dependence of non-Debye disorder in doped manganites

Meneghini, C and Cimino, R and Pascarelli, S and Mobilio, S and Raghu, C and Sarma, DD (1997) Temperature dependence of non-Debye disorder in doped manganites. In: Physical Review B: Condensed Matter, 56 (7). pp. 3520-3523.

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Abstract

Ca-doped manganite La1-xCaxMnO3 samples with x=0.2 and 0.4 were investigated by extended x-ray absorption fine structure (EXAFS) as a function of temperature and preparation method. The samples exhibit characteristic resistivity change across the metal-insulator (MI) transition temperature whose shape and position depend on Ca-doping concentration and sample thermal treatment. EXAFS results evidenced an increase of nonthermal disorder at the MI transition temperature which is significantly correlated with the resistivity behavior.

Item Type:	Journal Article
Additional Information:	Copyright of this article belongs to The American Physical Society.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	22 Jun 2011 07:43
Last Modified:	22 Jun 2011 07:43
URI:	http://eprints.iisc.ernet.in/id/eprint/38528

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