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2005 | 108 | 1 | 113-118
Article title

Influence of the Grain Size on Polaron Transport in Nanostructured La_{2/3}Ca_{1/3}MnO_3 Evidenced by EPR

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Abstracts
EN
We report an electron paramagnetic resonance investigation of the grain size effects on the polaron transport in the paramagnetic regime of nanosized La_{2/3} Ca_{1/3}MnO_3 manganites. The temperature dependences of the EPR integral intensity were analyzed in terms of spin-spin exchange interaction and small polaron hopping scenarios. The polaron activation energy decreases with the reduction of the grain size. A discussion is given concerning the factors which could explain the observed change.
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Contributors
author
  • National Institute for Research and Development of Isotopic and Molecular, Technologies, P.O. Box 700, 400293 Cluj-Napoca, Romania
author
  • National Institute for Material Physics, P.O. Box 700, 400293 76900 Bucharest-Magurele, Romania
author
  • National Institute for Research and Development of Isotopic and Molecular, Technologies, P.O. Box 700, 400293 Cluj-Napoca, Romania
author
  • National Institute for Research and Development of Isotopic and Molecular, Technologies, P.O. Box 700, 400293 Cluj-Napoca, Romania
author
  • National Institute for Research and Development of Isotopic and Molecular, Technologies, P.O. Box 700, 400293 Cluj-Napoca, Romania
author
  • Institute of Molecular Physics, Polish Academy of Sciences, 60-179 Poznań, Poland
author
  • Institute of Molecular Physics, Polish Academy of Sciences, 60-179 Poznań, Poland
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv108n113kz
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