| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Magnetization of Co-Fe-Ta-B-O Amorphous Thin Films |
| Chengyue Xiong1,2,3, Cheng Chen4, Wen Sun5, Ziyao Lu1,2,3, Hongming Mou1,2,3, Xiaozhong Zhang1,2,3** |
1Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084
2Beijing National Center for Electron Microscopy, Tsinghua University, Beijing 100084
3Centre for Brain-Inspired Computing Research, Tsinghua University, Beijing 100084
4Research Institute for Magnetoelectronics & Weak Magnetic-field Detection, College of Science, China Three Gorges of University, Yichang 443002
5Institute of Microelectronics, Tsinghua University, Beijing 100084
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| Cite this article: |
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Chengyue Xiong, Cheng Chen, Wen Sun et al 2019 Chin. Phys. Lett. 36 077502 |
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Abstract An amorphous magnetic material system (Co$_{20}$Fe$_{47}$Ta$_{20}$B$_{13})_{1-x}$O$_{x}$ is fabricated by magneto sputtering. Three stages of magnetization behavior exist when oxygen content changes in the system. As the oxygen increases, the absence of percolation effect of magnetic nano-particles makes the multi-domain structure broken so that high coercivity appears in the samples with proper oxygen content. A temperature-dependent Stoner–Wohlfarth model is used to explain the magnetization properties at relatively high temperature. Magnetizations with magnetic field in and out of the sample plane are also investigated to prove the mechanisms. This work provides a systematic study of a new kind ofv amorphous magnetic system and is helpful for us to know more about this type of material.
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Received: 20 March 2019
Published: 20 June 2019
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| PACS: |
75.20.-g
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(Diamagnetism, paramagnetism, and superparamagnetism)
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75.50.Lk
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(Spin glasses and other random magnets)
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75.60.-d
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(Domain effects, magnetization curves, and hysteresis)
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64.60.A-
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(Specific approaches applied to studies of phase transitions)
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| Fund: Supported by the National Key Research and Development Program of China under Grant No 2017YFA0206202, and the National Natural Science Foundation of China under Grant Nos 51471093 and 116741901. |
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