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Published in: Journal of Materials Science: Materials in Electronics 2/2017

30-09-2016

Electrical conductivity analysis and magnetic properties of Pr0.7Ca0.3Mn0.95Co0.05O3 oxide

Authors: A. Selmi, M. Khelifi, H. Rahmouni, R. M’nassri, K. Khirouni, N. Chniba Boudjada, A. Cheikhrouhou

Published in: Journal of Materials Science: Materials in Electronics | Issue 2/2017

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Abstract

The structural, electrical, magnetic and magnetocaloric properties of Pr0.7Ca0.3Mn0.95Co0.05O3 have been studied. The X-ray diffraction refinement results indicate that the sample is single phase and crystallizes in the distorted orthorhombic system with Pnma space group. The investigation of the temperature and frequency dependence of conductance indicates that the sample exhibits a semi-insulator character and the conduction mechanism is explained using hopping model. Complex impedance analysis confirms the contribution of grain boundary in the transport properties in the Pr0.7Ca0.3Mn0.95Co0.05O3 system. Magnetocaloric effect and transition order are investigated by using magnetization measurements. The field dependence of magnetic entropy change and relative cooling power are analyzed and showing the power law dependence. The Landau theory for phase transitions framework is applied to describe the magnetocaloric effect in Pr0.7Ca0.3Mn0.95Co0.05O3 manganite. The obtained results are discussed in terms of magnetoelastic and electron interaction contribution to the magnetic entropy.

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Metadata
Title
Electrical conductivity analysis and magnetic properties of Pr0.7Ca0.3Mn0.95Co0.05O3 oxide
Authors
A. Selmi
M. Khelifi
H. Rahmouni
R. M’nassri
K. Khirouni
N. Chniba Boudjada
A. Cheikhrouhou
Publication date
30-09-2016
Publisher
Springer US
Published in
Journal of Materials Science: Materials in Electronics / Issue 2/2017
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-016-5742-4

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