Bi1−xEuxFeO3 Powders: Synthesis, Characterization, Magnetic and Photoluminescence Properties

Nanomaterials

OvidiuCristian Oprea¹  Vasile-Adrian Surdu²  BogdanȘtefan Vasile²  Ecaterina Andronescu²  RoxanaDoina Trușcă²  AdelinaCarmen Ianculescu²  Eugenia Tanasă²  Lucian Diamandescu³ 

[1] Department of Inorganic Chemistry, Physical Chemistry and Electrochemistry, Faculty of Applied Chemistry and Materials Science, “Politehnica” University of Bucharest, Gh. Polizu Street no. 1-7, 011061 Bucharest, Romania;Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, “Politehnica” University of Bucharest, Gh. Polizu Street no. 1-7, 011061 Bucharest, Romania;National Institute of Materials Physics, 077125 Bucharest-Măgurele, Romania;

关键词: bismuth ferrite;    sol-gel process;    magnetic properties;    photoluminescence properties;   

DOI  :  10.3390/nano9101465

来源: DOAJ

【 摘 要 】

Europium substituted bismuth ferrite powders were synthesized by the sol-gel technique. The precursor xerogel was characterized by thermal analysis. Bi_1−xEu_xFeO₃ (x = 0−0.20) powders obtained after thermal treatment of the xerogel at 600 °C for 30 min were investigated by X-ray diffraction (XRD), scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), Raman spectroscopy, and Mössbauer spectroscopy. Magnetic behavior at room temperature was tested using vibrating sample magnetometry. The comparative results showed that europium has a beneficial effect on the stabilization of the perovskite structure and induced a weak ferromagnetism. The particle size decreases after the introduction of Eu³⁺ from 167 nm for x = 0 to 51 nm for x = 0.20. Photoluminescence spectroscopy showed the enhancement of the characteristic emission peaks intensity with the increase of Eu³⁺ concentration.

【 授权许可】

Unknown