The preparation of cylindrical MgB2 films on stainless steel by HPCVD for magnetic shielding
| Autor: | Xinwei Cai, Xuebin Liao, Can Yang, Zhengshan Guo, Wenhao Luo, Ruirui Niu, Zizhao Gan, Qingrong Feng, Yan Zhang, Zigeng Huang, Yiling Chen |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Superconductivity Materials science Transition temperature Energy Engineering and Power Technology Cryogenics Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials law.invention SQUID Planar law 0103 physical sciences Electromagnetic shielding Volume reduction Cylinder Electrical and Electronic Engineering Composite material 010306 general physics |
| Zdroj: | Physica C: Superconductivity and its Applications. 551:28-32 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/j.physc.2018.06.002 |
| Popis: | HT C SQUID has a great potential in ultra-weak magnetic signal detections due to its advantages of energy saving and volume reduction of the overall system, including the cryogenics. However, the application of HT C SQUID is limited because lack of proper magnetic shielding. Superconducting magnetic shielding is an efficient way for HT C SQUID. In this work, we fabricate MgB 2 thick film on a stainless steel cylinder using HPCVD to make a preliminary attempt for SMS with MgB 2 films. High quality MgB 2 film is deposited on the inner side of a hollowed cylinder. The transition temperature of the film is 37.5 K, and the critical current density is 7.6 × 10 6 A⋅cm −2 at 10 K and 4.6 × 10 6 A⋅cm −2 at 20 K, which is comparable with the planar films. The shielding effectiveness of the cylindrical MgB 2 film is numerical simulated. Height and thickness of the cylindrical magnetic shielding designed according to the simulation result was calculated and a corresponding shielding effectiveness of 65 dB is obtained. The numerical result shows the feasibility of using MgB 2 film as magnetic shielding. |
| Databáze: | OpenAIRE |
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