Research on the origin of magneto-crystalline anisotropy in R2Fe14B compounds |
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| Affiliation: | 1. State Key Laboratory of Electroanalytical Chemistry, c/o Engineering Laboratory for Modern Analytical Techniques, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China;2. Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;3. Shenyang Agricultural University, Shenyang 110161, China;1. Department of Physics and Astronomy, National Institute of Technology, Rourkela 769008, India;2. School of Basic Science, Indian Institute of Technology, Bhbaneswar 752050, India;1. Bio-nanotechnology Engineering Department, Engineering Faculty, Istanbul University, 34452 Beyazıt, Istanbul, Turkey;2. TÜBITAK-UME, National Metrology Institute, P.O. Box 54, 41470 Gebze, Kocaeli, Turkey;3. Department of Chemistry, İstanbul Medeniyet University, 34700 Üsküdar, İstanbul, Turkey;4. Department of Nano-Medicine Research, Institute for Research & Medical Consultations (IRMC), University of Dammam, P.O. Box 1982, Dammam 31441, Saudi Arabia;1. School of Physics, Southeast University, Nanjing 211189, China;2. Jiangsu Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures, Department of Physics, Nanjing University, Nanjing, 210093, China;3. National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China |
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| Abstract: | A model for the calculation of the magneto-crystalline anisotropy in R2Fe14B (R is a rare earth) compounds is presented. According to the model, a combined effect on the R-ion, coming from both the crystal field of ligands and the electric field of itinerant electrons, results in the anisotropy of the compounds. An approach of calculating the interaction between the itinerant electrons and the central R-ion is given. Taking account of the combined effect, we calculated the temperature dependences of the anisotropy of all the five R2Fe14B-type (R = Pr, Nd, Tb, Dy and Ho) compounds with uniaxial anisotropy. The results are in good agreement with the experiments. The calculation has shown that the effect of the itinerant electrons plays an important role for the anisotropy of the compounds. |
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