Comparative study of structural and electrical study of bismuth doped at La and Mn site of La0.7Sr0.3MnO3

Daivajna, Mamatha D and Naik, Kshma (2016) Comparative study of structural and electrical study of bismuth doped at La and Mn site of La0.7Sr0.3MnO3. In: International Conference on Science, 01/06/2016, Hyatt Place.

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Abstract

We report the structural and electrical properties of polycrystalline bismuth (Bi) doped La0.7Sr0.3MnO3 (x = 0, 0.1 and 0.2) at La(A) and Mn(B) site. Refinement of X-ray powder diffraction patterns show that all samples crystallize in Rhombohedral structure with R-3C space group. There is decrease in unit cell volume as well as metal to insulator transition temperature TMI in both site Bi doping. It is found that values of resistivity are higher at B site doping compared that of A site for all concentrations. It is found that the value of TMI is a 233K and 227K and resistivity at peak is 184m Ω-cm and 675mΩ-cm in La and Mn doped samples respectively for x=0.1. The competition between the Mn–O–Mn double exchange and the Bi–O–Mn super-exchange of Mn3+ by Bi3+ may explain the increase in resistivity

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Manganites, Double exchange, Resistivity, Cation
Subjects: Engineering > MIT Manipal > Physics
Depositing User: MIT Library
Date Deposited: 13 Jan 2017 11:06
Last Modified: 13 Jan 2017 11:06
URI: http://eprints.manipal.edu/id/eprint/148086

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