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Effects of sintering temperature on physical properties of nanocrystalline La0.85Na0.15MnO3 ceramics

Published online by Cambridge University Press:  14 November 2011

K.L. Liu ,
C.Y. Li ,
D.Y. Wu  and
Y.Q. Wang
K.L. Liu*
Affiliation:
Department of Physics, Zhoukou Normal University, Zhoukou 466000, P.R. China
C.Y. Li
Affiliation:
Department of Physics, Zhoukou Normal University, Zhoukou 466000, P.R. China
D.Y. Wu
Affiliation:
Department of Physics, Zhoukou Normal University, Zhoukou 466000, P.R. China
Y.Q. Wang
Affiliation:
Department of Technology and Physics, Zhengzhou University of Light Industry, Zhengzhou 450002, P.R. China
*
ae mail: liukuili@zknu.edu.cn
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Abstract

Nanocrystalline La0.85Na0.15MnO3 ceramics were prepared via a novel method based on chemical solution combustion. Effects of sintering temperature on electrical transport and magnetic properties were systematically investigated. It was found that the resistivity increases, the magnetization decreases, and the metal-insulator transition temperature shifts toward low temperatures with the decrease of the sintering temperature. In addition, the magnetization of the samples sintered at low temperatures exhibits a broadened paramagnetic-to-ferromagnetic transition temperature. The low field magnetoresistance evidently increases with decreasing the sintering temperature due to the spin-polarized intergranular tunneling.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 56 , Issue 3: Focus on organic electronic devices , December 2011 , 30602
Copyright
© EDP Sciences, 2011

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