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Ordering of polarons in Pr0.5Ca0.5MnO3

✍ Scribed by A. Levstik; C. Filipič; V. Bobnar; S. Drnovšek; J. Holc; Z. Trontelj; Z. Jagličić

Publisher: Elsevier Science
Year: 2010
Tongue: English
Weight: 585 KB
Volume: 150
Category: Article
ISSN: 0038-1098
DOI: 10.1016/j.ssc.2010.03.034

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✦ Synopsis

We report detailed dielectric investigations of Pr 1-x Ca x MnO 3 (PCMO, x = 0.5) ceramics, a member of the perovskite manganite family that exhibits a colossal magnetoresistance. Analysis of the electrical conductivity and dielectric constant data revealed that in the low temperature phase, below 42 K, small polarons are responsible for the charge transport in the system. This provides a new understanding of the phase diagrams in PCMO systems

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