Belavi, P. B. and Chavan, G. N. and Naik, L. R. and Somashekar, R. and Kotnala, R. K. (2012) Structural, electrical and magnetic properties of cadmium substituted nickel–copper ferrites. Materials Chemistry and Physics, 132 (1). 138 - 144. ISSN 0254-0584
Full text not available from this repository. (Request a copy)Abstract
Polycrystalline ferrites with the general formula Ni0.95−xCdxCu0.05Fe2O4 in which x varies from 0.1 to 0.3 were synthesized by standard double sintering ceramic technique. The existence of single phase cubic spinel structure of ferrites was confirmed from XRD measurement. Surface morphology and compositional features were studied by SEM and EDX measurements. Absorption bands observed in FTIR spectra at 600cm−1 (υ1) and 410cm−1 (υ2) corresponds to vibrations of tetrahedral and octahedral complexes respectively. In the dc conductivity measurements the decrease of dc resistivity with increase of temperature indicates the semiconducting nature of ferrites. The dielectric measurement of the samples at room temperature studied in the frequency range 20Hz to 1MHz shows dispersion in the low frequency region and remains constant at high frequency region. However, the small polaron hoping type of conduction mechanism was inferred from the linear increase of ac conductivity. The magnetic properties of ferrites such as saturation magnetization, magnetic moment and Y–K angles was estimated as a function of cadmium content by VSM technique. The smaller value of Mr/Ms reveals the existence of multidomain (MD) particles in the ferrite samples.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FTIR, XRD, SEM, Dc resistivity, Dielectric constant, Saturation magnetization |
| Subjects: | D Physical Science > Physics |
| Divisions: | Department of > Physics |
| Depositing User: | C Swapna Library Assistant |
| Date Deposited: | 24 Jul 2019 09:14 |
| Last Modified: | 24 Jul 2019 09:14 |
| URI: | http://eprints.uni-mysore.ac.in/id/eprint/5520 |
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