Fluctuations in the local fields due to Al{sup 3+} ions substitution in the M-type barium hexaferrites, BaFe{sub 12{minus}x}Al{sub x}O{sub 12}
- Mahidol Univ., Bangkok (Thailand)
- Mahidol Univ., Bangkok (Thailand). Dept. of Physics
The effects of aluminum substitution into the M-type Ba-hexaferrites on the saturation magnetization and Mossbauer spectrum of these ferrites are studied. The saturation magnetization M{sub s} of the BaFe{sub 12{minus}x}Al{sub x}O{sub 12} is seen to decrease linearly with increasing Al substitution. The Mossbauer spectrums for the x = 0.1, 0.2 and 0.6 specimens were all resolved as superpositions of four sub-spectrums (12k, 4f{sub iv} + 2a, 4f{sub vi} and 4e). The half width of the Mossbauer lines of the 4f{sub iv} + 2a sextets is seen to broadening as Al ions are substituted into the ferrite. No broadening is seen in the lines of the other sextets. These behaviors (the line broadening and the linear decrease in M{sub s}) are consistent with the Al{sup 3+} ions substituting preferentially into the 2a sites.
- OSTI ID:
- 328419
- Journal Information:
- International Journal of Modern Physics B, Vol. 12, Issue 27-28; Other Information: PBD: 10 Nov 1998
- Country of Publication:
- United States
- Language:
- English
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