Please use this identifier to cite or link to this item:
http://nopr.niscpr.res.in/handle/123456789/29358| Title: | Dielectric properties of spinel Co3-xMnxO4 (x = 0.1, 0.4, 0.7, and 1.0) ceramic compositions |
| Authors: | Meena, P L Sreenivas, K Kumar, Ravi |
| Keywords: | Dielectric properties;Ceramic;Jonscher’s range |
| Issue Date: | Sep-2014 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Cobalt manganese
oxides Co3-xMnxO4 (x = 0.1, 0.4, 0.7, and 1.0) multi-ferroic ceramic were prepared by conventional solid state technique to
understand the effect of Mn substitution at Co site on the structural and
dielectric properties. Single phase polycrystalline with a linear increase in
the lattice parameter ‘a’ was
observed without any structural change in cubic crystal symmetry with Mn
substitution. The effect of Mn substitution on the dielectric constant (ε') and loss tangent (tan ) was
measured over a wide temperature range (150-450 K) and frequency range (100-900
kHz). A very weak frequency dispersion and small temperature dependence was
observed in ε' and tan at low temperature, however, ε' and tan display
a strong frequency and temperature dependency at higher temperature. The ε' shows a ferroelectric like transition
and shift to lower temperature with Mn incorporation. The behaviour of tan shows dielectric
relaxation and also shifts towards lower temperature with Mn incorporation. The
ceramic compositions show universal dielectric response with temperature
dependent exponent
factor‘s’ and which fall in Jonscher’s range.
|
| Page(s): | 625-631 |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Appears in Collections: | IJPAP Vol.52(09) [September 2014] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJPAP 52(9) 625-631.pdf | 416.93 kB | Adobe PDF | View/Open |
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