Yaseneva, Polina, Bowker, Michael  ORCID: https://orcid.org/0000-0001-5075-1089 and Hutchings, Graham John ORCID: https://orcid.org/0000-0001-8885-1560
2011.
Structural and magnetic properties of Zn-substituted cobalt ferrites prepared by co-precipitation method.
Physical Chemistry Chemical Physics
13
(41)
, pp. 18609-18614.
10.1039/c1cp21516g
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Abstract
Zn substituted cobalt ferrite spinels with the general formula ZnxCo1−xFe2O4 (with x varying from 0 to 0.5) were synthesized by a co-precipitation method and calcined at 500 °C and 800 °C. It was found that Zn substitution has a big effect in decreasing the Curie temperature (Tc), from around 440 °C for the undoped sample to 180 °C with x = 0.5. However, these values were also strongly affected by the pre-calcination temperature of the samples, thus TC shifts from 275 °C for the x = 0.3 sample to 296 °C after calcination at 500 °C and 800 °C respectively. These effects are due to facilitation of demagnetisation by substitution of the non-magnetic Zn ions and by production of very small nanoparticles. The latter are removed by higher temperature calcinations and so TC increases.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Chemistry Research Institutes & Centres > Cardiff Catalysis Institute (CCI) |
| Subjects: | Q Science > QD Chemistry |
| Publisher: | Royal Society of Chemistry |
| ISSN: | 1463-9076 |
| Last Modified: | 03 Dec 2022 11:11 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/12415 |
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