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
• Languages of publication: EN

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.

Keywords

EN

75.50.Tt; 73.63.Bd; 76.50.+g

Discipline

• 73.63.Bd: Nanocrystalline materials
• 75.50.Tt: Fine-particle systems; nanocrystalline materials
• 76.50.+g: Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance(see also 75.30.Ds Spin waves)

• Journal: Acta Physica Polonica A
• Year: 2005
• Volume: 108
• Issue: 1
• Pages: 113-118

Dates

published

2005-07

received

2005-04-24

Contributors

author

O. Raita

• National Institute for Research and Development of Isotopic and Molecular, Technologies, P.O. Box 700, 400293 Cluj-Napoca, Romania

author

M. Grecu

• National Institute for Material Physics, P.O. Box 700, 400293 76900 Bucharest-Magurele, Romania

author

X. Filip

• National Institute for Research and Development of Isotopic and Molecular, Technologies, P.O. Box 700, 400293 Cluj-Napoca, Romania

author

D. Toloman

• National Institute for Research and Development of Isotopic and Molecular, Technologies, P.O. Box 700, 400293 Cluj-Napoca, Romania

author

L. Giurgiu

• National Institute for Research and Development of Isotopic and Molecular, Technologies, P.O. Box 700, 400293 Cluj-Napoca, Romania

author

S. Idziak

• Institute of Molecular Physics, Polish Academy of Sciences, 60-179 Poznań, Poland

author

S. Hoffmann

• Institute of Molecular Physics, Polish Academy of Sciences, 60-179 Poznań, Poland

References

• 1. C. Zener, Phys. Rev., 82, 403, 1951
• 2. H. Roder, J. Zhang, A. Bishop, Phys. Rev. Lett., 76, 1356, 1996
• 3. M. Jaime, M.B. Salamon, M. Rubinstein, R.E. Treece, J.S. Horwitz, D.B. Chrisey, Phys. Rev. B, 54, 11914, 1996
• 4. J.M. deTeresa, K. Dorr, K.H. Muller, L. Schultz, R.I. Chakalova, Phys. Rev. B, 58, R5928, 1998
• 5. C.H. Booth, F. Bridges, G.H. Kwei, J.M. Lawrence, A.L. Cornelius, J.J. Neumeier, Phys. Rev. Lett., 80, 853, 1998
• 6. M.A. Lopez-Quintela, L.E. Hueso, J. Rivas, F. Rivadulla, Nanotechnology, 14, 212, 2003
• 7. D.L. Huber, G. Alejandro, A. Caneiro, M.T. Causa, F. Prado, M. Tovar, S.B. Osero, Phys. Rev. B, 60, 12155, 1999
• 8. A.I. Shames, E. Rozenberg, G. Gorodetsky, Ya.M. Mukovskii, Phys. Rev. B, 68, 174402, 2003
• 9. L. Malavasi, M.C. Mozzati, S. Polizzi, C.B. Azzoni, G. Flor, Chem. Mater., 15, 5036, 2003
• 10. S. Das, P. Chowdhury, T.K.G. Rao, D. Das, D. Bahadur, Solid State Commun., 121, 691, 2002
• 11. L.V. Giurgiu, M.N. Grecu, X. Filip, O. Raita, A. Darabont, D. Gavre, J. Blasco, Appl. Magn. Reson., 24, 351, 2003
• 12. O. Raita, M.N. Grecu, X. Filip, A. Darabont, D. Gavre, J. Blasco, L.V. Giurgiu, J. Optoelectron. Adv. Mater., 5, 289, 2003
• 13. L.M. Giurgiu, M.N. Grecu, A. Darabont, O. Raita, X. Filip, O. Pana, D. Toloman, Appl. Magn. Reson., 27, 139, 2004
• 14. A. Shengelaya, G.M. Zhao, H. Keller, K.A. Muller, B.I. Kochelaev, Phys. Rev. B, 61, 5888, 2000
• 15. D.S. Yang, A.N. Ulyanov, M.H. Phan, I. Kim, B.K. Ahn, J.R. Rhee, J.S. Kim, C. Nguyen, S.C. Yu, Physica B, 327, 183, 2003
• 16. O. Chauvet, T. Stoto, L. Zuppiroli, Phys. Rev. B, 49, 5876, 1994
• 17. D.C. Worledge, G.F. Snyder, M.R. Beasley, T.H. Geballe, J. Appl. Phys., 80, 5158, 1996
• 18. H.L. Ju, J. Gopalakrishnan, J.L. Peng, Q. Li, G.C. Xiong, T. Venkatesan, R.L. Green, Phys. Rev. B, 51, 6143, 1995

Identifiers

DOI

10.12693/APhysPolA.108.113