Affiliation:
1. College of Nuclear Science and Technology, University of South China, Hengyang 421001, China
2. Zhuhai Tsinghua University Research Institute Innovation Center, 101 University, Ave, Tangjiawan Zhuhai 519000, China
Abstract
A series of Bi[Formula: see text]Ba[Formula: see text]Fe[Formula: see text]CoxO3 ([Formula: see text], 0.05, 0.10, and 0.15) samples were synthesized using the tartaric acid modified sol–gel method. The crystal structure of the prepared samples was analyzed by XRD, and the samples co-doped with Ba and Co were all rhombohedral distorted structures with the R3c space group. With an increase in the doping amount, a reduction in lattice parameters was observed along with crystallite sizes consistently being below 62[Formula: see text]nm. Mössbauer spectral analysis at room temperature reveals a good fit with two sextets and a doublet, all attributed to the Fe[Formula: see text] state. This suggests that the charge balance within the samples is maintained through the generation of oxygen vacancies in the system. The hysteresis loops of all samples revealed the weak ferromagnetic of the Co-doped Bi[Formula: see text]Ba[Formula: see text]FeO3 nanoparticles. With the increase in Co doping, the magnetic parameters such as saturation magnetization and coercive field significantly improved.
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