Structural and magnetic properties of Zn-substituted cobalt ferrites prepared by co-precipitation method

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:	Chemistry 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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