Exploration of the Effect of Oxygen on Superconductivity in MgB<sub>2</sub> Bulk by Using Boron Powder with Different Particle and Purification
In this study, boron powder with different particle sizes was purified by both chemical and heat treatment methods. The reduction in the particle size can improve the chemical purification with no effort on the heat treatment. The superconducting properties of the powder drastically changed even wit...
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MDPI AG
2021-03-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/11/3/278 |
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| author | Liangqun Yang Hongli Suo Lin Ma Min Liu Wanli Zhao Jianhua Liu Lei Wang Zili Zhang Qiuliang Wang |
| author_facet | Liangqun Yang Hongli Suo Lin Ma Min Liu Wanli Zhao Jianhua Liu Lei Wang Zili Zhang Qiuliang Wang |
| author_sort | Liangqun Yang |
| collection | DOAJ |
| description | In this study, boron powder with different particle sizes was purified by both chemical and heat treatment methods. The reduction in the particle size can improve the chemical purification with no effort on the heat treatment. The superconducting properties of the powder drastically changed even with only a partial elimination of oxygen. On the one hand, less oxygen content resulted in high <i>T</i><sub>c</sub> and <i>J</i><sub>c</sub> values under the low magnetic field, and most importantly, a significant improvement in the superconducting connectivity (<i>A</i><sub>f</sub> value). On the other hand, the degradation of <i>J</i><sub>c</sub> under a high field and a change in the pinning mechanism were also found, along with decreasing oxygen. This result indicated that oxygen, probably MgO, might act as the pinning center and as an obstacle for the supercurrent in MgB<sub>2</sub> at the same time. This work paves the way for obtaining pure oxygen-free MgB<sub>2</sub> and understanding the real effect of oxygen in MgB<sub>2</sub>. |
| first_indexed | 2024-03-10T13:19:23Z |
| format | Article |
| id | doaj.art-83252068b1fc49d085995b253d1e1259 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T13:19:23Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-83252068b1fc49d085995b253d1e12592023-11-21T10:07:05ZengMDPI AGCrystals2073-43522021-03-0111327810.3390/cryst11030278Exploration of the Effect of Oxygen on Superconductivity in MgB<sub>2</sub> Bulk by Using Boron Powder with Different Particle and PurificationLiangqun Yang0Hongli Suo1Lin Ma2Min Liu3Wanli Zhao4Jianhua Liu5Lei Wang6Zili Zhang7Qiuliang Wang8Beijing University of Technology, Beijing 100124, ChinaBeijing University of Technology, Beijing 100124, ChinaBeijing University of Technology, Beijing 100124, ChinaBeijing University of Technology, Beijing 100124, ChinaBeijing University of Technology, Beijing 100124, ChinaInstitute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaInstitute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaIn this study, boron powder with different particle sizes was purified by both chemical and heat treatment methods. The reduction in the particle size can improve the chemical purification with no effort on the heat treatment. The superconducting properties of the powder drastically changed even with only a partial elimination of oxygen. On the one hand, less oxygen content resulted in high <i>T</i><sub>c</sub> and <i>J</i><sub>c</sub> values under the low magnetic field, and most importantly, a significant improvement in the superconducting connectivity (<i>A</i><sub>f</sub> value). On the other hand, the degradation of <i>J</i><sub>c</sub> under a high field and a change in the pinning mechanism were also found, along with decreasing oxygen. This result indicated that oxygen, probably MgO, might act as the pinning center and as an obstacle for the supercurrent in MgB<sub>2</sub> at the same time. This work paves the way for obtaining pure oxygen-free MgB<sub>2</sub> and understanding the real effect of oxygen in MgB<sub>2</sub>.https://www.mdpi.com/2073-4352/11/3/278boron powderpurificationparticle sizeMgB<sub>2</sub>superconducting connectivity |
| spellingShingle | Liangqun Yang Hongli Suo Lin Ma Min Liu Wanli Zhao Jianhua Liu Lei Wang Zili Zhang Qiuliang Wang Exploration of the Effect of Oxygen on Superconductivity in MgB<sub>2</sub> Bulk by Using Boron Powder with Different Particle and Purification Crystals boron powder purification particle size MgB<sub>2</sub> superconducting connectivity |
| title | Exploration of the Effect of Oxygen on Superconductivity in MgB<sub>2</sub> Bulk by Using Boron Powder with Different Particle and Purification |
| title_full | Exploration of the Effect of Oxygen on Superconductivity in MgB<sub>2</sub> Bulk by Using Boron Powder with Different Particle and Purification |
| title_fullStr | Exploration of the Effect of Oxygen on Superconductivity in MgB<sub>2</sub> Bulk by Using Boron Powder with Different Particle and Purification |
| title_full_unstemmed | Exploration of the Effect of Oxygen on Superconductivity in MgB<sub>2</sub> Bulk by Using Boron Powder with Different Particle and Purification |
| title_short | Exploration of the Effect of Oxygen on Superconductivity in MgB<sub>2</sub> Bulk by Using Boron Powder with Different Particle and Purification |
| title_sort | exploration of the effect of oxygen on superconductivity in mgb sub 2 sub bulk by using boron powder with different particle and purification |
| topic | boron powder purification particle size MgB<sub>2</sub> superconducting connectivity |
| url | https://www.mdpi.com/2073-4352/11/3/278 |
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