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Structure and Electrical Conductivity of Irradiated BaTiO 3 Nanoparticles
Author(s) -
Shameer Ahmed Basheer,
Nandaprakash Mysuru Basavaraju,
Namratha Keerthiraj,
Byrappa Kullaiah,
Somashekar Rudrappa
Publication year - 2018
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201700581
Subject(s) - materials science , nanoparticle , raman spectroscopy , irradiation , dielectric , analytical chemistry (journal) , conductivity , transmission electron microscopy , tetragonal crystal system , dielectric spectroscopy , nanotechnology , crystallography , chemistry , optics , crystal structure , optoelectronics , chromatography , electrochemistry , physics , electrode , nuclear physics
The effects of gamma irradiation on hydrothermally synthesized BaTiO 3 nanoparticles have been investigated. Gamma irradiation is carried out at room temperature from 0, 50, 100, 150, 200 kGy to maximum dosage up to 250 kGy with 60 Co source. Prepared BaTiO 3 nanoparticles are investigated using line profile analysis employing X‐ray diffraction (XRD) data; the structure, size, dielectric and conductivity properties of the BaTiO 3 are studied using Raman spectroscopy, transmission electron microscopy (TEM), and impedance analyzer. The post‐irradiation volume of the BaTiO 3 unit cell increases with dosage and most of the cells possess a modified tetragonal structure. The Grüneisen constant is high for 242 cm −1 optical modes with 150 kGy and lowest for 516 cm −1 optical mode for 50 kGy irradiation. The morphology changes and particle size decreases as the radiation dose is increased. Conductivity ( σ ) increases with the increase in radiation dose, especially at 50 kGy. Cole–Cole plot is suggestive of the depolarization nature of irradiated BaTiO 3 nanoparticles.