The magnetism of BiFeO3 powders

Conventional sintering and direct ball milling of Bi2O3 + Fe2O3 mixture were used for the fabrication of BiFeO3 powders. The fabricated powders were performed annealing or high energy ball milling to vary the grain size from bottom-up or top-down. It was found that the magnetization of the powders s...

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Bibliographic Details
Published inFunctional materials letters Vol. 8; no. 2
Main Authors Luo, Xi, Tseng, Li-Ting, Li, Sean, Yi, Jiabao
Format Journal Article
LanguageEnglish
Published Singapore World Scientific Publishing Company 01.04.2015
World Scientific Publishing Co. Pte., Ltd
Subjects
Ball milling
Bismuth ferrite
Bismuth oxides
Bismuth trioxide
Cooling effects
Grain size
Magnetism
Magnetization
Sintering (powder metallurgy)
Size effects
Spin glasses
high energy ball milling
BiFeO3
Magnetism
finite size effect
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Summary:Conventional sintering and direct ball milling of Bi2O3 + Fe2O3 mixture were used for the fabrication of BiFeO3 powders. The fabricated powders were performed annealing or high energy ball milling to vary the grain size from bottom-up or top-down. It was found that the magnetization of the powders synthesized by both methods plotted with the reciprocal of the grain size could be linearly fitted, indicating that the magnetism is from the finite size effect. Exchange bias phenomenon was observed after field cooling (FC) of the powders, confirming the magnetization is due to the uncompensated or canted surface spins. No spin glass behavior was found in these powders.
Bibliography:ObjectType-Article-1
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content type line 14
ISSN:1793-6047
1793-7213
DOI:10.1142/S1793604715500277