9-13 July 2012
Africa/Johannesburg timezone
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Synthesis and Magnetic properties of Mg0.2Cr1.8-xFexO3 oxides

Presented by Mr. Kalengay MBELA on 10 Jul 2012 from 17:30 to 19:30
Type: Poster Presentation
Session: Poster Session
Track: Track A - Division for Condensed Matter Physics and Materials

Abstract

We report the magnetic properties of Mg<sub>0.2</sub>Cr<sub>1.8-x</sub>Fe<sub>x</sub>O<sub>3</sub> (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.

Award

yes

Level

PhD

Supervisor

T. Moyo Moyo@ukzn.ac.za

Paper

yes

Place

Location: IT Building
Room:


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