Mössbauer Analysis and Cation Distribution of Zn Substituted BaFe{sub 12}O{sub 19} Hexaferrites

Barium hexaferrite is a well-known hard magnetic material. Doping using nonmagnetic cation such as Zn{sup 2+} were found to enhance magnetization owing to preferential tetrahedral site (4 f{sub 1}) occupancy of the zinc. However, the distribution of cations in hexaferrites depends on many factors su...

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Bibliographic Details
Published in:Journal of superconductivity and novel magnetism 2018-01, Vol.31 (1)
Main Authors: Auwal, I. A., Korkmaz, A. D., Amir, M. D., Asiri, S. M., Baykal, A., Güngüneş, H., Shirstah, S. E.
Format: Article
Language:English
Subjects:
BARIUM COMPOUNDS
CATIONS
CHEMICAL COMPOSITION
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
DOPED MATERIALS
FERRITES
IRON 57
ISOMER SHIFT
LINE WIDTHS
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MAGNETIZATION
MOESSBAUER SPECTROMETERS
QUADRUPOLES
SOL-GEL PROCESS
ZINC
ZINC IONS
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Summary:Barium hexaferrite is a well-known hard magnetic material. Doping using nonmagnetic cation such as Zn{sup 2+} were found to enhance magnetization owing to preferential tetrahedral site (4 f{sub 1}) occupancy of the zinc. However, the distribution of cations in hexaferrites depends on many factors such as the method of preparation, nature of the cation, and chemical composition. Here, Zn-doped barium hexaferrites (Ba{sub 1−x}Zn{sub x}Fe{sub 12}O{sub 19}) were synthesized by sol-gel method. In this study, we summarized the magnetic properties of Ba{sub 1−x}Zn{sub x}Fe{sub 12}O{sub 19} (x = 0, 0.1, 0.2, 0.3) BaM, investigated by Mössbauer spectroscopy. Moreover, cation distribution was also calculated for all the products. Mössbauer parameters were determined from 57Fe Mössbauer spectroscopy and according to it, the replacement of Ba-Zn affects all parameters such as isomer shift, the variation in line width, hyperfine magnetic field, and quadrupole splitting. Cation distribution revealed the relative area of undoped BaM, 12k, 2a, and 4 f{sub 2} positions which are close to theoretical values.
ISSN:1557-1939
1557-1947
DOI:10.1007/S10948-017-4170-X