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Journal of Materials Science: Materials in Electronics
Published in: Journal of Materials Science: Materials in Electronics 8/2018

18-01-2018

Influence of silver addition on microstructures and transport properties of La0.67Ca0.33MnO3:Ag x composites

Authors: Fei Jin, Junmei Luo, Hui Zhang, Shengan Yang, Qingming Chen

Published in: Journal of Materials Science: Materials in Electronics | Issue 8/2018

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Abstract

In order to obtain high temperature coefficient of resistance (TCR) value of La0.67Ca0.33MnO3:Ag x (LCMO:Ag x ) composites, samples with different Ag contents (x = 0, 0.1, 0.2, 0.25, 0.3, and 0.5) were prepared by sol–gel method. X-ray diffraction analyses indicated that all samples had orthorhombic perovskite structures. As x increased, lattice parameters (a, b, c) and cell volumes underwent slight expansions. Interestingly, the addition of Ag dramatically affected TCR and magneto-resistance (MR) values. Elevated TCR value up to 53.46%·K−1 at 277 K was observed for LCMO:Ag x composites with added Ag at the composition of x = 0.1. Meanwhile, MR value at 263 K reached 71% at the magnetic field of 1 T for samples with Ag composition of x = 0.25. The increase in Mn4+/Mn3+ ratio and improvement in crystallization caused by added Ag was found responsible for the elevated values of TCR, MR, and Tp. These findings may have practical use in high-performance magneto-resistive manganites.
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Metadata
Title
Influence of silver addition on microstructures and transport properties of La0.67Ca0.33MnO3:Ag x composites
Authors
Fei Jin
Junmei Luo
Hui Zhang
Shengan Yang
Qingming Chen
Publication date
18-01-2018
Publisher
Springer US
Published in
Journal of Materials Science: Materials in Electronics / Issue 8/2018
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-018-8591-5

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