Effect of La doping on structural, magnetic and microstructural properties of Ba1 − x La x Fe12O19 ceramics prepared by citrate combustion process
- 237 Downloads
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.
KeywordsBarium ferrites Hysteresis loops Magnetization Coercivity
Unable to display preview. Download preview PDF.
- 1.R.A. McCurrie, Ferromagnetic Materials: Structure and Properties (Academic Press, London, 1994), p. 155 & 234.Google Scholar
- 4.H. Kojima, in Fundamental Properties of Hexagonal Ferrites: Ferromagnetic Materials, edited by E.P. Wohlfarth (New York, North-Holland, 1982), p. 305.Google Scholar
- 27.B.D. Cullity, Introduction to Magnetic Materials (Addison-Wesley, Massachusetts, 1972), p. 347.Google Scholar