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https://doi.org/10.1016/j.jallcom.2014.07.126
Copy DOIJournal: Journal of Alloys and Compounds | Publication Date: Jul 30, 2014 |
Citations: 80 |
Large single crystals of aluminum-substituted M-type barium hexaferrite BaFe12−xAlxO19 were obtained from carbonate flux. The Al content in the crystals can be controlled via the Al content of the flux up to x=1.1 according to single crystal X-ray structure refinements. Al shows a distinct preference to substitute Fe on crystallographic sites with high coordination numbers by oxygen atoms, whereas no significant amounts of Al can be found on a tetrahedrally coordinated site. An increasing amount of the aluminum dopant results in a monotonous reduction of the Curie temperature from 440 to 415°C and the saturation magnetization at room temperature from 68 to 57emu/g for single crystal and from 61 to 53emu/g for powder samples.
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