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Crystal structure,electrical and magnetic properties of anion-deficient perovskite-like Ba3SmFe2O7.5
Affiliation:1. Institute of Solid State Chemistry UB RAS, 620041, 91, Pervomayskaya St., Yekaterinburg, Russia;2. Institute of Natural Science and Mathematics, Ural Federal University, 620000, 51 Lenin Av., Yekaterinburg, Russia;3. Laboratory of Hydrogen Energy, Ural Federal University, 620002, 19 Mira St., Yekaterinburg, Russia;1. Guangzhou Jishi Construction Group Co., Ltd., Guangzhou, 510725, PR China;2. School of Civil Engineering and Transportation, South China University of Technology, Guangzhou, 510640, PR China;3. School of Civil Engineering, Guangzhou City University of Technology, Guangzhou, 510800, PR China;1. School of Material Science and Engineering, Shaanxi University of Science and Technology, Xian, 710021, PR China;2. Mona Lisa Group Co., Ltd., Foshan, 528211, PR China;1. Department of Physics, Deenbandhu Chhotu Ram University of Science and Technology, Murthal, Haryana, India;2. Department of Physics, Guru Jambheshwar University of Science and Technology, Hisar, Haryana, India;1. School of Materials Science and Engineering, Harbin Institute of Technology Weihai, Weihai, 264205, China;2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150006, China;1. Powder Metallurgy Research Institute, Central South University, Changsha, 410012, Hunan, PR China;2. State Key Laboratory of V and Ti Resources Comprehensive Utilization, Ansteel Research Institute of Vanadium & Titanium (Iron & Steele), Panzhihua, 617000, Sichuan, PR China;3. Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang, 110819, PR China;4. School of Metallurgy, Northeastern University, Shenyang, 110819, PR China;1. School of Mechanical Engineering and Automation, Northeastern University, Shenyang, China;2. National Frontiers Science Center for Industrial Intelligence and Systems Optimization, Shenyang, 110819, China;3. Key Laboratory of Date Analytics and Optimization for Smart Industry (Northeastern University), Ministry of Education, China
Abstract:Anion-deficient perovskite-like Ba3SmFe2O7.5 was prepared using a glycerol–nitrate synthesis. Using high-temperature X-ray diffraction in situ a crystal structure transition temperature range 800 and 840 °C was established. These results were further confirmed by high-temperature dilatometric analysis. The average thermal expansion coefficient (TEC) of Ba3SmFe2O7.5 is about 12.8 × 10−6 K−1 between 25 °C and 800 °C. Magnetic experiments proved an excellent phase purity of the oxide and reveal that Fe3+ ions stay in high and intermediate spin states in a ratio of 75% and 25% respectively.
Keywords:B. X-ray methods  C. Magnetic properties  C. Electrical conductivity  D Perovskites
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