Issue 41, 2011

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

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.

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

Article information

Article type
Paper
Submitted
11 May 2011
Accepted
08 Sep 2011
First published
26 Sep 2011

Phys. Chem. Chem. Phys., 2011,13, 18609-18614

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

P. Yaseneva, M. Bowker and G. Hutchings, Phys. Chem. Chem. Phys., 2011, 13, 18609 DOI: 10.1039/C1CP21516G

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