Chromium doping effects on structural and dielectric properties of Mn-Zn cobaltites

Journal Article · Fri May 06 00:00:00 EDT 2016 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4946352· OSTI ID:22606421

Yadav, A. ^[1]; Choudhary, P.; Varshney, Dinesh ^[1]; Shah, P. ^[2]

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1. School of Physics, Vigyan Bhavan, Devi Ahilya University, Khandwa Road Campus, Indore 452001 (India)
2. Amity Institute of Nanotechnology, Amity University, Sector 125, Noida 201303 (India)

The effect of transition metal Cr{sup 2+} ion as a dopant of Zn{sup 2+} in Mn{sub 0.5}Zn{sub 0.5}Co{sub 2}O{sub 4} is investigated. Co-doped Mn{sub 0.5}Zn{sub 0.5-x}Cr{sub x}Co{sub 2}O{sub 4} (x = 0, 0.3 and 0.5) cobaltites were prepared by solid-state reaction route. X-ray powder diffraction (XRD) analysis reveals that the samples prepared are polycrystalline single-phase cubic spinel in structure having a space group Fd3m. An increase in average particle size observed with Cr{sup 2+} doping. However other structural parameters such as X-ray density, micro strain and dislocation density shows almost a similar decreasing trend with increase in Cr{sup 2+}. High value of permittivity ∼10{sup 5} is observed for the parent Mn{sub 0.5}Zn{sub 0.5}Co{sub 2}O{sub 4} and shows a substantial decrease with increase in the Cr{sup 2+} doping. Higher doping of Cr{sup 2+} also increases the dielectric loss and hence limits its technological importance. At lower frequencies ac conductivity has been found to increase with increase in Cr{sup 2+} content.

• OSTI ID: 22606421
• Journal Information: AIP Conference Proceedings, Vol. 1728, Issue 1; Conference: ICC 2015: International conference on condensed matter and applied physics, Bikaner (India), 30-31 Oct 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHROMIUM ADDITIONS
COBALT COMPOUNDS
CUBIC LATTICES
DENSITY
DIELECTRIC MATERIALS
DISLOCATIONS
DOPED MATERIALS
LOSSES
MANGANESE COMPOUNDS
OXYGEN COMPOUNDS
PERMITTIVITY
POLYCRYSTALS
POWDERS
SOLIDS
SPACE GROUPS
SPINELS
STRAINS
X RADIATION
X-RAY DIFFRACTION
ZINC COMPOUNDS