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Author Kumar, N. S. Krishna ♦ Shahid, T. S. ♦ Govindaraj, G.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ COPRECIPITATION ♦ DIPOLES ♦ ELECTRIC CONDUCTIVITY ♦ FERRITES ♦ FREQUENCY DEPENDENCE ♦ IMPEDANCE ♦ MANGANESE COMPOUNDS ♦ NANOSTRUCTURES ♦ POLARONS ♦ RELAXATION ♦ TEMPERATURE DEPENDENCE ♦ X-RAY DIFFRACTION ♦ ZINC COMPOUNDS
Abstract Nano-crystalline Mn{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} was synthesized by chemical co-precipitation method and characterized with X-ray diffraction. Ac electrical impedance data are taken for the frequency range of 1Hz to 1MHz for various temperatures from 303K to 483K. The ac electrical conduction deviates from the Debye type relaxation which indicates polaron type conduction. In the present study unique anomalous relaxation function in time and frequency domain is used to investigate deviation from the Debye relaxation. The physical basis of anomalous or non-Debye process is explained in terms of change in Debye dipole μ{sub D}=ρr{sub D} of charge ρ into gρ due to the molecular charge interaction and defect disorder. This interaction shifts the Debye relaxation rate τ to a slow relaxation rate τ{sup g}. The fraction 0<g<1 is emerged as the exponent on frequency and time domain function of non-Debye relaxation.
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-06-24
Publisher Place United States
Volume Number 1665
Issue Number 1


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