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Structural and tunable dielectric properties of cobalt ferrite-based nanocomposites
Nanocomposites C:S-1:4 comprising cobalt ferrite (CoFe 2 O 4 ), strontium ferrite (SrFe 12 O 19 ) and C:B-1:4 containing cobalt ferrite (CoFe 2 O 4 ), barium ferrite (BaFe 12 O 19 ) were synthesized in weight ratios of 1:4 by chemical co-precipitation route with higher content corresponding to SrFe...
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| Published in: | Ferroelectrics 2021-11, Vol.584 (1), p.175-186 |
|---|---|
| Main Authors: | , |
| Format: | Article |
| Language: | English |
| Subjects: | |
| Citations: | Items that this one cites |
| Online Access: | Get full text |
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| Summary: | Nanocomposites C:S-1:4 comprising cobalt ferrite (CoFe
2
O
4
), strontium ferrite (SrFe
12
O
19
) and C:B-1:4 containing cobalt ferrite (CoFe
2
O
4
), barium ferrite (BaFe
12
O
19
) were synthesized in weight ratios of 1:4 by chemical co-precipitation route with higher content corresponding to SrFe
12
O
19
and BaFe
12
O
19
. Rietveld refinement was employed to confirm the presence of independent CoFe
2
O
4
, SrFe
12
O
19
and BaFe
12
O
19
phases. The average crystallite size of CoFe
2
O
4
and SrFe
12
O
19
in C:S-1:4 was observed as 20 nm and 56 nm which depicts an increase as compared to individual components. The observed lattice strain in C:S-1:4 was 0.05% and 0.03% for CoFe
2
O
4
and SrFe
12
O
19
. In C:B-1:4, the value of strain was 0.06% and 0.04% for CoFe
2
O
4
and BaFe
12
O
19
. Increased lattice strain was observed in the prepared composites. Increase in impedance for the prepared composites was observed from measurements performed in the frequency range 20 -10
6
Hz. Conduction mechanism was explained by overlapping large polaron tunneling model. Dielectric loss measurements for the prepared composites were observed to decrease establishing their usage in microwave applications. |
|---|---|
| ISSN: | 0015-0193 1563-5112 |
| DOI: | 10.1080/00150193.2021.1984775 |