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Author Choudhary, Pankaj ♦ Dar, M. A. ♦ Varshney, Dinesh ♦ Tyagi, Tarun
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 ♦ ATOMIC RADII ♦ CHROMIUM ADDITIONS ♦ CRYSTAL STRUCTURE ♦ CUBIC LATTICES ♦ DIELECTRIC MATERIALS ♦ DOPED MATERIALS ♦ FERRITES ♦ LATTICE PARAMETERS ♦ LATTICE VIBRATIONS ♦ LOSSES ♦ MANGANESE COMPOUNDS ♦ PERMITTIVITY ♦ POLYCRYSTALS ♦ SOLIDS ♦ SPINELS ♦ X-RAY DIFFRACTION ♦ ZINC COMPOUNDS
Abstract A series of Cr doped Mn-Zn ferrites with compositional formula Mn{sub 0.5}Zn{sub 0.5-x}Cr{sub x}Fe{sub 2}O{sub 4} (x = 0, 0.3, 0.5) were prepared by solid-state reaction route. X-ray diffraction (XRD) analysis reveals that the samples prepared are polycrystalline cubic spinel in structure (Fd3m) with some secondary phase of α–Fe{sub 2}O{sub 3}. Slight variation in the lattice parameter of Cr doped Mn{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} has been observed due to difference in ionic radii of cations. Small shift in Raman modes towards higher wave number has been observed. Further the line width decreases with the doping ions. A giant dielectric constant ~10{sup 4} is observed for parent Mn{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} which is found to decrease with increase in Cr{sup 2+} doping. Low dielectric loss is observed for Mn{sub 0.5}Zn{sub 0.5}Fe{sub 2}O{sub 4} and improves with Cr{sup 2+} doping at Zn{sup 2+} site.
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-05-23
Publisher Place United States
Volume Number 1731
Issue Number 1


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