Tuning structure and magnetic properties of table-like magnetocaloric effect in Er6MnSb2 by zirconium substitution |
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| Affiliation: | 1. College of Chemistry and Chemical Engineering, Key Laboratory of New Processing Technology for Nonferrous Metal and Materials (Ministry of Education); Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China;2. School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, China;3. Department of Materials Science and Engineering, Korea University, Seoul, 02841, South Korea;4. Department of Civil Engineering, The University of Hong Kong, Hong Kong SAR, China;1. Institute of Physics and Technology, Ural Federal University, Yekaterinburg, 620002, Russia;2. Faculty of Science, Al-Azhar University, Assuit Branch, Assuit, 71524, Egypt;3. Polymer Lab, Department of Petrochemicals, Egyptian Petroleum Research Institute, Nasr City, Cairo, Egypt;4. Department of Physics, Faculty of Science, University of Tabuk, Tabuk, Saudi Arabia;5. Physics Department, Faculty of Science, Al-Azhar University (Girls Branch), Nasr City, Cairo, Egypt;6. Department of Physics, College of Science, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh, 11671, Saudi Arabia;1. Shanghai Key Laboratory of High Temperature Superconductors, Physics Department, Shanghai University, Shanghai 200444, China;2. Shanghai Creative Superconductor Technologies Co., Ltd., Shanghai 201401, China;1. College of Mining, Guizhou University, Guiyang 550025, China;2. National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources from Karst Areas, Guiyang 550025, China;3. Guizhou Key Laboratory of Comprehensive Utilization of Non-metallic Mineral Resources, Guiyang 550025, China;1. School of Resource and Environmental Sciences, Wuhan University, Wuhan 430079, China;2. China Southern Power Grid Technology Co., Ltd., Guangzhou 510080, China;3. Electric Power Research Institute of Guangdong Power Grid Co. Ltd., Guangzhou 510080, China;1. Key Laboratory of Electromagnetic Processing of Materials, Northeastern University, Shenyang, 110819, China;2. State Key Laboratory of Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China;3. State Key Laboratory for Mechanical Behavior of Materials, Xi''an Jiaotong University, Xi''an, 710048, China;4. Department of Physics and Chemistry of Materials, School of Material Science and Engineering, Northeastern University, Shenyang, 110819, China |
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| Abstract: | In this study, zirconium (Zr) successfully substituted for erbium (Er) in Er6–xZrxMnSb2 (x = 0, 0.5, 1, 1.5) of the Fe2P type, with comprehensive characterizations on crystal structure, electronic structure and magnetic properties. According to synchrotron powder X-ray diffraction data analysis and density functional theory calculation, Zr does not randomly but preferentially occupy during the doping process and results in weaker magnetic exchange interactions and depressed ordering temperatures. The electronic structure data show that the doping of Zr can weaken interaction between Er and Mn atoms. Owing to multiple transitions, the Er6–xZrxMnSb2 (x = 0, 0.5, 1, 1.5) exhibit table-like magnetocaloric effect. Er6MnSb2 displays wide δTFWHM (full width at half maximum of the magnetic entropy change curve) of 116 K and high relative cooling power of 388.62 J/kg for 3 T. The maximum magnetic entropy change of Er6–xZrxMnSb2 is increased from 3.81 to 7.69 J/(kg·K) with the Zr content up from x = 0 to x = 1.5. |
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| Keywords: | Preferential occupancy Magnetic exchange Table-like magnetocaloric effect Rare earths |
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