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

O. Raita; M. Grecu; X. Filip; D. Toloman; L. Giurgiu; S. Idziak; S. Hoffmann

doi:10.12693/APhysPolA.108.113

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Acta Physica Polonica A

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

Authors

O. Raita , M. Grecu , X. Filip , D. Toloman , L. Giurgiu , S. Idziak , S. Hoffmann

Content

http://przyrbwn.icm.edu.pl/APP/PDF/108/a108z113.pdf [remote]

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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.

Keywords

75.50.Tt 73.63.Bd 76.50.+g

Publisher

Institute of Physics, Polish Academy of Sciences

Journal

Acta Physica Polonica A

Year

2005

Volume

108

Issue

Pages

113-118

Physical description

Dates

published

2005-07

received

2005-04-24

References

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Document Type

Publication order reference

YADDA identifier

bwmeta1.element.bwnjournal-article-appv108n113kz

Identifiers

DOI

10.12693/APhysPolA.108.113