| 旋转超导体产生的微弱伦敦磁场的探测 |
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| 引用本文： | 谢晓明,孙越.旋转超导体产生的微弱伦敦磁场的探测[J].稀有金属材料与工程,2008(Z4). |
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| 作者姓名： | 谢晓明 孙越 |
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| 作者单位： | 中国科学院上海微系统与信息技术研究所信息功能材料国家重点实验室; |
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| 摘 要： | 旋转超导体会在其内部产生一均匀磁场,称为伦敦磁场。伦敦磁场的研究具有重要理论和应用价值。本文对微弱伦敦磁场的探测方法进行了初步研究,使用多层超导筒屏蔽外界环境磁场的干扰,采用超导量子干涉器件(SQUID)来读出旋转超导体产生的磁场。通过对冻结磁通产生的干扰信号的有效分离,成功地观测到了伦敦磁场信号.通过理论分析,确定了伦敦磁场探测对应屏蔽性能的要求,对提高伦敦磁场探测信噪比的措施进行了讨论。
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| 关 键 词： | 旋转超导体 伦敦磁场 超导屏蔽 冻结磁通 超导量子干涉器件(SQUID) |
Detection of London Moment of Rotating Superconductor |
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| Xie Xiaoming,Sun Yue.Detection of London Moment of Rotating Superconductor[J].Rare Metal Materials and Engineering,2008(Z4). |
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| Authors: | Xie Xiaoming Sun Yue |
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| Affiliation: | Xie Xiaoming,Sun Yue (State Key Laboratory of Function Materials for Informatics,Shanghai Institute of Microsystem , Information Technology,Chinese Academy of Sciences,Shanghai 200050,China) |
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| Abstract: | A rotating superconductor will generate a uniform magnetic field in its interior, which is called London field. Investigation on London field has great importance on both theoretical and application aspects. A method for detecting the weak London field was investigated. The environmental magnetic field was shielded using multilayer superconducting cylinder, and the signals from the London moment was readout by a Superconducting Quantum Interference Device (SQUID). By distinguished and separated noise signal... |
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| Keywords: | rotating superconductor London field shield frozen flux |
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