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Influence of Sintering Temperature on the Structure and Electrical Transport Properties of La0.7Ba0.1Sr0.2Mn0.85Cu0.15O3 Manganites
Dhawud Sabilur Razaq(a), Budhy Kurniawan(a*), Agung Imaduddin(b)

(a) Department of Physics, Universitas Indonesia, Depok 16424, Indonesia
* budhy.kurniawan[at]sci.ui.ac.id
(b) Research Center for Metallurgy and Materials, Indonesian Institute of Sciences (LIPI), Gedung 470, Puspiptek, South Tangerang 15314, Banten, Indonesia


Abstract

A systematic study of the La0.7Ba0.1Sr0.2Mn0.85Cu0.15O3 manganites have been conducted, mainly to understand the influence of sintering temperature on structure, microstructure, and electrical transport properties in the materials. Polycrystalline sample of La0.7Ba0.1Sr0.2Mn0.85Cu0.15O3 were prepared using sol-gel method and sintered at 1100 °C and 1200 °C. X-ray diffraction result shows that sintering temperature does not affect the crystal structure of the materials which remain rhombohedral with R-3c space group. a more detailed examination shows that sintering temperature change the unit cell volume, bond length, and bond angle of the samples. The electrical resistivity decreases followed by the decrease in the grain size with the increase in sintering temperature. Analysis using theoretical model shows that both samples can be well explained using percolation model. Fitting result suggests that the transport properties of the materials at low temperature were governed by the scattering and interaction between electron, phonon, and magnon. At high temperature, the electrical transport of the samples were governed by the hopping of polarons.

Keywords: Structure; Electrical Transport; Sintering; Percolation Model; Manganites

Topic: Material Science

Link: https://ifory.id/abstract/QhkW6jvTfrCw

Conference: The 4th Annual Applied Science and Engineering Conference (AASEC 2019)

Plain Format | Corresponding Author (dhawud sabilur razaq)

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