Grain size effect on activation energy in spinel CoFe{sub 2}O{sub 4} ceramic

Journal Article · Mon May 23 00:00:00 EDT 2016 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4948046· OSTI ID:22608791

Supriya, Sweety; Kumar, Sunil; Kar, Manoranjan ^[1]

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1. Department of Physics, Indian Institute of Technology Patna, Patna-800013 (India)

Cobalt ferrite of different average crystallites (from nanocrystallite to micro crystallites) has been prepared by the Sol-Gel Method. The X-ray diffraction (XRD) analysis confirms the cubic spinel phase with no trace of impurity phases. The effect of annealing temperature on micro structure and electric transport properties as a function of frequency and temperature has been studied. It is observed that the electric impedance and conductivity are strongly dependent on grain size. The impedance spectroscopic study is employed to understand the electrical transport properties of cobalt ferrite.

• OSTI ID: 22608791
• Journal Information: AIP Conference Proceedings, Vol. 1731, Issue 1; Conference: DAE solid state physics symposium 2015, Uttar Pradesh (India), 21-25 Dec 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
ACTIVATION ENERGY
ANNEALING
CERAMICS
COBALT COMPOUNDS
COBALT OXIDES
ELECTRIC IMPEDANCE
FERRITES
FREQUENCY DEPENDENCE
GRAIN SIZE
IMPURITIES
SOL-GEL PROCESS
SPINELS
X-RAY DIFFRACTION