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Microstructure, electrical and magnetic properties of polycrystalline La0.85K0.15MnO3 manganites prepared by different synthesis routes


Citation

Pan, K. Y. and Shaari, Abdul Halim and Lim, Kean Pah and Wan Yusoff, Wan Mohamad Daud and Chen, Soo Kien and Navasery, Manizheh (2013) Microstructure, electrical and magnetic properties of polycrystalline La0.85K0.15MnO3 manganites prepared by different synthesis routes. Journal of Materials Science: Materials in Electronics, 24 (6). pp. 1869-1874. ISSN 0957-4522; ESSN: 1573-482X

Abstract

Influence of different synthesis techniques (solid state reaction, sol–gel and co-precipitation) on the structure, microstructure, magnetic and electrical properties of polycrystalline La0.85K0.15MnO3 (LKMO) sintered at 900 °C is investigated. All the as-synthesized compounds were confirmed as single phase and hexagonal structure at room temperature. The nano-crystallite size and average grain size were increased from the sample synthesized through solid state, sol–gel and co-precipitation techniques. The electrical and magneto-transport properties of polycrystalline LKMO was relied on the synthesis method. Significant decreases in metal–insulator transition temperature (Tp) with the increment of resistivity were observed for co-precipitation synthesized sample when comparing with solid state and sol–gel synthesized samples. Magnetization was decreased while ferro-paramagnetic transition temperature (T c) was shifted toward lower temperature from solid state synthesized sample to co-precipitation synthesized sample. Furthermore, co-precipitation synthesized sample achieved the highest negative magnetoresistance at room temperature.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
Institute of Advanced Technology
DOI Number: https://doi.org/10.1007/s10854-012-1025-x
Publisher: Springer Verlag
Keywords: Manganite; Magnetic and electrical properties; Sol-gels
Depositing User: Umikalthom Abdullah
Date Deposited: 23 Jun 2014 08:20
Last Modified: 28 Oct 2015 04:30
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1007/s10854-012-1025-x
URI: http://psasir.upm.edu.my/id/eprint/30062
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