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Journal of Materials Science: Materials in Electronics

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03-05-2016

Effect of annealing on exchange bias in Mg_0.2Fe_xCr_1.8−xO₃ nano oxides

Authors: Kalengay Mbela, T. Moyo, Nadir S.E. Osman

Published in: Journal of Materials Science: Materials in Electronics | Issue 9/2016

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Abstract

Magnesium-iron chromium oxides (Mg_0.2Cr_1.8−xFe_xO₃ with x varying from 0.3 to 0.9) produced by hydrothermal process in a stirred pressure reactor from pure metal chlorides have been annealed at 700 °C. Single phase corundum structure and nanophase structure of the as-synthesized samples were confirmed by X-ray diffraction (XRD). Instead of the correlation between H _EB and D _XRD observed at T _A = 600 °C, we find significant changes. The H _EB increases with decreasing particle size reaches a maximum at ~43 nm (x = 0.5) then decreases.

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Title: Effect of annealing on exchange bias in Mg0.2FexCr1.8−xO3 nano oxides
Authors: Kalengay Mbela
T. Moyo
Nadir S.E. Osman
Publication date: 03-05-2016
Publisher: Springer US
Published in: Journal of Materials Science: Materials in Electronics / Issue 9/2016
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI: https://doi.org/10.1007/s10854-016-4919-1

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