HPCVD Thin Film MgB2 for Superconducting Magnetic Shielding
| Autor: | Xinwei Cai, Zigeng Huang, Zhengshan Guo, Hongzhang Wang, Can Yang, Wenhao Luo, Ruirui Niu, Qingrong Feng, Zizhao Gan |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Superconductivity
Materials science High-temperature superconductivity business.industry Chemical vapor deposition Cryocooler Condensed Matter Physics Electronic Optical and Magnetic Materials Volumetric flow rate law.invention SQUID law Electromagnetic shielding Optoelectronics Electrical and Electronic Engineering Thin film business |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 29:1-4 |
| ISSN: | 2378-7074 1051-8223 |
| DOI: | 10.1109/tasc.2019.2895617 |
| Popis: | Superconducting magnetic shielding (SMS) is crucial for superconducting electronic devices such as superconducting quantum interference devices (SQUIDs). Current magnetic shielding devices suffer from high construction price, poor mobility, and flexibility. The MgB2 SMS with cryocooler could be the potential the solution. In this work, a hybrid physical–chemical vapor deposition system, which is capable of depositing on a long cylindrical surface, is demonstrated. A dense and robust MgB2 film has successfully been deposited on the inside wall of a Φ50 × 120 mm 304 stainless steel tube. A microscopic image indicated that the deposited MgB2 showed a dendritic structure with cracks on it. Sample with different B2H6 flow rates has been made, current result showed a better performance with higher B2H6 flow rate. However, safety issue should be taken into consideration as we further increase the B2H6 concentration. The sample deposited with 10 sccm 25% B2H6 showed the best performance so far with a TC of 34.4 K. A SQUID testing system specifically for high-temperature SQUID with MgB2 SMS with a liquid-helium-free cryogenic system has been design and under construction for the future researches. |
| Databáze: | OpenAIRE |
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