Open AccessColossal magnetoresistance of Nd-doped LaCaMnO3 polycrystalline ceramics
Author(s) -
Sam Rajan,
Arun K.V. Kumar,
Jayakumari Isac
Publication year - 2021
Publication title -
processing and application of ceramics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.326
H-Index - 15
eISSN - 2406-1034
pISSN - 1820-6131
DOI - 10.2298/pac2101095r
Subject(s) - materials science , magnetoresistance , rietveld refinement , orthorhombic crystal system , magnetization , crystallite , colossal magnetoresistance , condensed matter physics , ferromagnetism , curie temperature , paramagnetism , crystallography , crystal structure , metallurgy , magnetic field , chemistry , physics , quantum mechanics
The cation doped polycrystalline compound La0.5Nd0.15Ca0.35MnO3 has been synthesized by a conventional solid state reaction method. The Rietveld analysis of the powder XRD of the composites reveals an orthorhombic structure with Pbnm space group symmetry. The cell parameters are a = 5.4505 ?, b = 5.4457 ? and c = 7.6876?. The AC magnetization studies show a semiconducting paramagnetic to metallic ferromagnetic transition at a temperature below the Curie temperature TC which is found to be 206.3K. It is also observed that metal to semiconductor transition temperature TMS is very close to TC. The sample also possesses high magnetoresistance, which is revealed in MR studies.