SAIP2012

Synthesis and Magnetic properties of Mg_0.2Cr_1.8-xFe_xO₃ oxides

10 Jul 2012, 17:30

2h

IT Building

Poster Presentation Track A - Division for Condensed Matter Physics and Materials Poster Session

Speaker

Mr Kalengay Mbela (UKZN)

Main supervisor (name and email)<br>and his / her institution

T. Moyo Moyo@ukzn.ac.za

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

yes

Apply to be<br> consider for a student <br> &nbsp; award (Yes / No)?

yes

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD)?

PhD

Abstract content <br> &nbsp; (Max 300 words)

We report the magnetic properties of Mg_0.2Cr_1.8-xFe_xO₃ (x = 0.3, 0.5, 0.7 and 0.9) compounds. The oxides were produced by hydrothermal process and sintered at 600 ºC for 12 hours. The X-ray diffraction (XRD) data indicate single phase corundum structure in all the samples. The Mössbauer spectra recorded at about 300 K show transition from paramagnetic to ordered magnetic spin state at x = 0.5. The magnetization data reveals superparamagnetic nature of the oxides presented. The shift in hysteresis loops observed along the magnetic field axis is associated with exchange bias effect.

Presentation Materials

Paper

saip_new.pdf

Peer reviewing

Paper

Accepted on 2 May 2014 by Ncholu Manyala

221_A_Mbela.pdf