Affiliation:
1. College of Nuclear Science and Technology, University of South China, Hengyang 421001, P. R. China
2. Zhuhai Tsinghua University Research Institute, Innovation Center, 101 University Ave, Tangjiawan, Zhuhai 519000, P. R. China
Abstract
[Formula: see text] ([Formula: see text], 0.1, 0.3 and 0.5) series samples were prepared by sol–gel method and characterized by powder X-ray diffractometer (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and Mössbauer spectroscopy. The effects of Mn doping on the microstructure, morphology and electronic structure of La–Sr ferrite were investigated. The XRD results show that all samples are single phase and have orthorhombic structures with Pbnm space group. The surface morphology and composition of chemical elements of the samples were analyzed by SEM and EDS, and the experimental values were consistent with the expected values. The sample was tested by [Formula: see text]Fe Mössbauer spectroscopy at room temperature, and the results showed that the percentage of doublet increased gradually with the increase of Mn ion doping ratio, and at [Formula: see text], all the sextet disappeared and only the doublet existed. According to the analysis, it can be seen that the prepared series of samples underwent a transition from antiferromagnetic to paramagnetic.
Funder
National Natural Science Foundation of China
the Central Government Guided Local Science and Technology Development Special Fund Project
the National Undergraduate Innovation and Entrepreneurship Training Program Support Projects of China, the Natural Science Foundation of Hunan Province, China
the Natural Science Foundation of Hunan Province, China
Research Foundation of Education Bureau of Hunan Province, China
Publisher
World Scientific Pub Co Pte Ltd
Subject
Condensed Matter Physics,General Materials Science