Magnetic nanosized rare earth iron garnets R3Fe5O12: Sol–gel fabrication, characterization and reinspection

The magnetic nanosized rare earth iron garnets (R3Fe5O12, where R=Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) were prepared by an aqueous sol–gel method. Herein we present, that all these garnets can be obtained by this effective synthesis method simply by changing the temperature of the final annealing...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2017-01, Vol.422, p.425-433
Main Authors: Opuchovic, Olga, Kareiva, Aivaras, Mazeika, Kestutis, Baltrunas, Dalis
Format: Article
Language:English
Subjects:
Iron garnets
Magnetization measurements
Microstructure
Mössbauer spectroscopy
Sol–gel processing
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Summary:The magnetic nanosized rare earth iron garnets (R3Fe5O12, where R=Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) were prepared by an aqueous sol–gel method. Herein we present, that all these garnets can be obtained by this effective synthesis method simply by changing the temperature of the final annealing. It was also demonstrated, that a different annealing temperature leads to a different particle size distribution of the final product. The SEM analysis results revealed that the smallest particles were formed in the range of 75–130nm. The phase purity and structure of the rare earth iron garnets were estimated using XRD analysis and Mössbauer spectroscopy. Magnetic properties were determined by magnetization measurements. The relation between the particle size, composition and magnetic properties of the sol-gel derived garnets were also discussed in this study. •First time series of R3Fe5O12 (R=from Sm to Lu) are prepared by sol–gel process.•Different sintering temperature leads to the different particle size distribution.•Correlation between microstructure, composition and magnetic properties is shown.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2016.09.041