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Abstracts
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.
Discipline
Journal
Year
Volume
Issue
Pages
113-118
Physical description
Dates
published
2005-07
received
2005-04-24
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