Effect of annealing on exchange bias in Mg sub(0.2)Fe sub(x)Cr sub( 1.8-x)O sub(3) nano oxides

Magnesium-iron chromium oxides (Mg sub(0.2)Cr sub(1.8-x)Fe sub(x)O sub(3) 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 degree C. Single phase corundum structure and nanophase structure of the as-syn...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2016-09, Vol.27 (9), p.8916-8922
Main Authors: Mbela, Kalengay, Moyo, T, Osman, Nadir SE
Format: Article
Language:English
Subjects:
Annealing
Diffraction
Electronics
Exchange
Iron
Nanostructure
Oxides
X-ray diffraction
Online Access:Get full text
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Summary:Magnesium-iron chromium oxides (Mg sub(0.2)Cr sub(1.8-x)Fe sub(x)O sub(3) 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 degree 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 sub(EB) and D sub(XRD) observed at T sub(A) = 600 degree C, we find significant changes. The H sub(EB) increases with decreasing particle size reaches a maximum at ~43 nm (x = 0.5) then decreases.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-016-4919-1