镧和锰共掺杂对溶胶-凝胶法制备的BiFeO₃的结构、形貌及磁性能的影响

Lanthanum and Manganese Co-Doping Effects on Structural, Morphological, and Magnetic Properties of Sol-Gel Derived BiFeO.

作者信息

Karoblis Dovydas, Diliautas Ramunas, Mazeika Kestutis, Baltrunas Dalis, Niaura Gediminas, Talaikis Martynas, Beganskiene Aldona, Zarkov Aleksej, Kareiva Aivaras

机构信息

Institute of Chemistry, Vilnius University, Naugarduko 24, LT-03225 Vilnius, Lithuania.

Center of Physical Sciences and Technology, LT-02300 Vilnius, Lithuania.

出版信息

Materials (Basel). 2021 Aug 26;14(17):4844. doi: 10.3390/ma14174844.

DOI:10.3390/ma14174844

PMID:34500933

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8432725/

Abstract

In this work, lanthanum and manganese co-substitution effects on different properties of bismuth ferrite solid solutions BiLaFeMnO (x from 0 to 1) prepared by a sol-gel synthetic approach have been investigated. It was observed that the structural, morphological, and magnetic properties of obtained specimens are influenced by the amount of introduced La ions. Surprisingly, only the compound with a composition of BiFeMnO was not monophasic, and the presence of neighboring phases was determined from X-ray diffraction analysis and Mössbauer measurements. Structural transitions from orthorhombic to cubic and back to orthorhombic were also observed depending on the La amount. Antiferromagnetic behaviour was observed for all of the samples, with the highest magnetisation values for BiLaFeMnO. Additionally, structural attributes and morphological features were evaluated by Raman spectroscopy and scanning electron microscopy (SEM), respectively.

摘要

在本研究中，采用溶胶-凝胶合成法制备了铋铁氧体固溶体BiLaFeMnO（x从0到1），研究了镧和锰的共取代对其不同性能的影响。观察到所得样品的结构、形态和磁性受引入的La离子量的影响。令人惊讶的是，只有BiFeMnO组成的化合物不是单相的，通过X射线衍射分析和穆斯堡尔测量确定了相邻相的存在。根据La含量的不同，还观察到了从正交晶系到立方晶系再回到正交晶系的结构转变。所有样品均表现出反铁磁行为，其中BiLaFeMnO的磁化值最高。此外，分别通过拉曼光谱和扫描电子显微镜（SEM）对结构属性和形态特征进行了评估。