Effect of La doping on structural, magnetic and microstructural properties of Ba1 ? x
La
x
Fe12O19 ceramics prepared by citrate combustion process |
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Authors: | S Ounnunkad P Winotai S Phanichphant |
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Affiliation: | (1) Nanoscience Research Laboratory, Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand;(2) Department of Chemistry, Faculty of Science, Mahidol University, Rama VI Rd., Bangkok, 10400, Thailand |
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Abstract: | La-substituted M-type barium ferrites, Ba1 − x
La
x
Fe12O19, with x = 0.00–0.30 were successfully prepared via a citrate combustion process. Properties of the ceramics were characterized by
powder X-ray diffraction, vibrating sample magnetometry and scanning electron microscopy. XRD patterns revealed only magnetoplumbite
structure without minor phases. With increasing the La substituted content, the saturation magnetization (M
S
) was increased and reached to a maximum at x = 0.15 and then decreased but coercivity (H
C
) was increased. SEM micrographs of the dense ceramics showed the hexagonal platelet shape at low La content and the irregular
shape at high La content. |
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Keywords: | Barium ferrites Hysteresis loops Magnetization Coercivity |
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