Effect of Bi and Sr doping on morphological and magnetic properties of LaCo0.6Fe0.4O3 nanosized perovskites

Bulletin of materials science

U Megha¹  George Varghese²  K Shijina¹ 

[1] Department of Physics, University of Calicut, Kerala 673635, India$$Department of Physics, University of Calicut, Kerala 673635, IndiaDepartment of Physics, University of Calicut, Kerala 673635, India$$;Kerala State Council for Science, Technology and Environment, Thiruvananthapuram, Kerala 695004, India$$Kerala State Council for Science, Technology and Environment, Thiruvananthapuram, Kerala 695004, IndiaKerala State Council for Science, Technology and Environment, Thiruvananthapuram, Kerala 695004, India$$

关键词: Perovskites;    nanosized;    citrate solâ€�?�gel autocombustion method;    Williamson's Hall plot;    X-ray photoelectron spectroscopy;    vibrating sample magnetometer.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Nanopowders of La_1−xBi_xCo_0.6Fe_0.4O₃ multinary perovskites were synthesized by citrate solâ€�?�gel autocombustion method. Crystalline phase and the lattice parameters were obtained from X-ray diffraction pattern. The XRD result shows that all compounds have rhombhohedral crystal structure with space group and Bihave the presence of secondary peaks. Crystallite size, dislocation density, specific area and strain were calculated from XRD. The elemental composition and micrographs of grain were obtained from EDAX (energy dispersive X-ray analysis) and SEM (scanning electron microscopy), with an average grain size below 400 nm. Surface morphological studies using XPS (X-ray photoelectron spectroscopy) were used to find out the chemical states and surface proportion of oxygen present in samples. Finally, using the vibrating sample magnetometer the room temperature magnetic behaviour of compounds was studied and it was observed that the ferromagnetic behaviour of LaCo_0.6Fe_0.4O₃ was reduced by Bi and Sr doping.

【 授权许可】

Unknown