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Title: Studies on structural, dielectric, and transport properties of Ni{sub 0.65}Zn{sub 0.35}Fe{sub 2}O{sub 4}

We report the crystal structure, dielectric, transport, and magnetic properties of Ni{sub 0.65}Zn{sub 0.35}Fe{sub 2}O{sub 4}. Rietveld refinement results of X-ray diffraction patterns confirm the phase formation of the material with cubic crystal structure (Fd3{sup ¯}m). The frequency dependent ac conductivity behavior obeys the Jonscher's power law and is explained using the jump relaxation model. The observed behavior of temperature dependent bulk conductivity is attributed to the variable-range hopping of localized polarons. The correlation of polaron conduction and high permittivity behavior of NZFO is established on the basis of long range and short range conduction mechanisms. The complex impedance spectra clearly show the contribution of both grain and grain boundary effect on the electrical properties.
Authors:
; ; ;  [1] ;  [2] ;  [3]
  1. Department of Physics and Institute of Functional Nanomaterials, University of Puerto Rico, San Juan 00936, Puerto Rico (United States)
  2. Department of Physics and Engineering Physics, Tulane University, New Orleans, Louisiana 70118 (United States)
  3. Department of Physics, National Institute of Technology, Rourkela 769008 (India)
Publication Date:
OSTI Identifier:
22304492
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 24; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CORRELATIONS; CRYSTAL STRUCTURE; CUBIC LATTICES; DIELECTRIC MATERIALS; DIELECTRIC PROPERTIES; ELECTRIC CONDUCTIVITY; FERRITES; FREQUENCY DEPENDENCE; GRAIN BOUNDARIES; IMPEDANCE; MAGNETIC PROPERTIES; NICKEL COMPOUNDS; PERMITTIVITY; RELAXATION; SPECTRA; TEMPERATURE DEPENDENCE; X-RAY DIFFRACTION; ZINC COMPOUNDS