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Title: Structural and dielectric properties of the lutetium (Lu) and yttrium (Y) doped nickel ferrite

The structural and dielectric characteristics of NiFe{sub 1.925}R{sub 0.075}O{sub 4} (R=Lu,Y) were investigated. The material crystallize in the cubic inverse spinel phase with a very small amount of RFeO{sub 3} (R=Lu,Y) as the additional phase. Frequency variation of the dielectric constant shows the dispersion that can be modeled with a modified Debye's function, which considers the possibility of more than one ion, contributing to the relaxation. Impedance spectroscopic analysis indicates the different relaxation mechanisms, bulk grain and grain-boundary contributions to the electrical conductivity and capacitance of these materials.
Authors:
;  [1]
  1. Department of Physics, Indian Institute of Technology Madras, Chennai-600036 (India)
Publication Date:
OSTI Identifier:
22269305
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1591; Journal Issue: 1; Conference: 58. DAE solid state physics symposium 2013, Patiala, Punjab (India), 17-21 Dec 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DIELECTRIC MATERIALS; DISPERSIONS; DOPED MATERIALS; ELECTRIC CONDUCTIVITY; FERRITE; FERRITES; GRAIN BOUNDARIES; LUTETIUM; NICKEL; PERMITTIVITY; RELAXATION; SPINELS; YTTRIUM