Effect of La Doping on Structural and Magnetic Properties of SrLa_xFe_12−xO₁₉ Ceramics from Aqueous Solution Method

Abstract:

Influences of different amount of La-substituted on structural and magnetic properties of M-type strontium ferrites SrLa_xFe_(12−x)O₁₉ compounds prepared by an aqueous solution method have been systematically investigated by XRD, VSM and TEM. In this work, it is found that only magnetoplumbite structure exists in the sample rather minorphases from the XRD patterns. When the doping content is x≤0.06mol, substituting of La³⁺ for Fe³⁺ occurs, forming SrLa_xFe_(12-x)O₁₉. In contrast, when the doping content is x>0.06mol, Sr2+ is substituted by La³⁺, forming Sr_(1-x)La_xFe₁₂O₁₉. The saturation magnetization (σs) shows its maximum at x=0.04 while the peak value of the intrinsic coercive field (Hjc) presented at x=0.06 as the La substituted content increases. The obtained results also indicated that the shape of the formed SrLa_xFe_(12−x)O₁₉ is oblong with 70nm length and 40nm width.

• Periodical: Advanced Materials Research (Volumes 557-559)
• Pages: 695-699
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.557-559.695
• Online since: July 2012
• Authors: Jian An Liu, Mei Mei Zhang, Shu Jiang Liu, Xue Na Yang
• Keywords: Aqueous Solution Method, Ceramic, La Doping, Magnetic Property, Strontium Ferrite

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