Synthesis of BiFeO3 by carbonate precipitation

Bulletin of materials science

Rajeev Ranjan¹  V Kothai¹ 

[1] Department of Materials Engineering, Indian Institute of Science, Bangalore 560 012, India$$Department of Materials Engineering, Indian Institute of Science, Bangalore 560 012, IndiaDepartment of Materials Engineering, Indian Institute of Science, Bangalore 560 012, India$$

关键词: BiFeO3;    carbonate precipitation technique.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Magnetoelectric multiferroic BiFeO₃ (BFO) was synthesized by a simple carbonate precipitation technique of metal nitrate solutions. X-ray powder diffraction and thermo-gravimetric analysis (TGA) revealed that the precipitate consists of an intimate mixture of crystalline bismuth carbonate and an amorphous hydroxide of iron. The precipitate yielded BiFeO₃ at an optimal calcination temperature of ∼560°C. Energy dispersive X-ray (EDX) analysis showed 1:1 ratio between Bi and Fe in the oxide. X-ray photoelectron spectroscopy (XPS) studies confirmed that Fe to be in +3 oxidation states both in the precipitated powder and BiFeO₃. The synthesized BFO exhibits a very weak ferromagnetic correlation at room temperature and the degree of which increases slightly on cooling down to 10 K suggesting alteration in the long range spatial modulation of the spins arrangement as compared to the bulk BiFeO₃.

【 授权许可】

Unknown