Temperature dependence of non-Debye disorder in doped manganites

Meneghini, C. ; Cimino, R. ; Pascarelli, S. ; Mobilio, S. ; Raghu, C. ; Sarma, D. D. (1997) Temperature dependence of non-Debye disorder in doped manganites Physical Review B: Condensed Matter and Materials Physics, 56 (7). pp. 3520-3523. ISSN 1098-0121

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Official URL: http://prb.aps.org/abstract/PRB/v56/i7/p3520_1

Related URL: http://dx.doi.org/10.1103/PhysRevB.56.3520


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:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:46296
Deposited On:04 Jul 2011 06:51
Last Modified:04 Jul 2011 06:51

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