Open AccessStructure, microstructure, electrical transport mechanism and magnetoresistance in La0.8Ag0.2MnO3
Author(s) -
Budhy Kurniawan,
N. A. Sahara,
A. Imadudin,
Ikhwan Nur Rahman,
Dhawud Sabilur Razaq,
Dicky Rezky Munazat
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1402/6/066011
Subject(s) - electrical resistivity and conductivity , magnetoresistance , materials science , ferromagnetism , condensed matter physics , paramagnetism , crystallite , microstructure , metal–insulator transition , volume fraction , atmospheric temperature range , analytical chemistry (journal) , metal , magnetic field , metallurgy , chemistry , physics , thermodynamics , composite material , chromatography , quantum mechanics
Bulk polycrystalline sample of La 0.8 Ag 0.2 MnO 3 has been successfully synthesized by the sol gel method. Structural, morphology, electrical properties and magnetoresistance has been investigated. Refinement results from XRD at room temperature showed a single-phase material with a rhombohedral crystal structure and R-3c space group. Electrical transport showed by comparison of experimental data with theoretical model, the sample undergo a metal-insulator transition at TM-I accompanying the ferromagnetic-paramagnetic transition. Data for temperature dependence of resistivity has been fitted using the formula ρ ( T ) = ρ FM f + (1 − f ) ρ PM , ρ PM is resistivity of the ferromagnetic region, ρ PM is resistivity of the paramagnetic region and f is the volume fraction of ferromagnetic phase. Result of fitted data is in good agreement with experimental data. MR measurements in the range of magnetic field 0-1 T, measurements were carried out at temperatures of 15 K, 100 K, 200 K and 285 K, the results showed a decrease in resistivity.