BiEuFeO粉末：合成、表征、磁性和光致发光特性

BiEuFeO Powders: Synthesis, Characterization, Magnetic and Photoluminescence Properties.

作者信息

Surdu Vasile-Adrian, Trușcă Roxana Doina, Vasile Bogdan Ștefan, Oprea Ovidiu Cristian, Tanasă Eugenia, Diamandescu Lucian, Andronescu Ecaterina, Ianculescu Adelina Carmen

机构信息

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.

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.

出版信息

Nanomaterials (Basel). 2019 Oct 16;9(10):1465. doi: 10.3390/nano9101465.

DOI:10.3390/nano9101465

PMID:31623131

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6835451/

Abstract

Europium substituted bismuth ferrite powders were synthesized by the sol-gel technique. The precursor xerogel was characterized by thermal analysis. BiEuFeO (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 Eu 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 Eu concentration.

摘要

采用溶胶-凝胶技术合成了铕取代的铋铁氧体粉末。通过热分析对前驱体干凝胶进行了表征。对在600℃下热处理干凝胶30分钟后得到的BiEuFeO（x = 0 - 0.20）粉末进行了X射线衍射（XRD）、扫描电子显微镜（FE-SEM）、透射电子显微镜（TEM）、拉曼光谱和穆斯堡尔光谱研究。使用振动样品磁强计测试了室温下的磁行为。对比结果表明，铕对钙钛矿结构的稳定有有益作用，并诱导出弱铁磁性。引入Eu后，粒径从x = 0时的167 nm减小到x = 0.20时的51 nm。光致发光光谱表明，随着Eu浓度的增加，特征发射峰强度增强。