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应用科学学报 ›› 2004, Vol. 22 ›› Issue (4): 528-532.

• 论文 • 上一篇    下一篇

用于室温样品的扫描SQUID显微镜的研制

丁红胜1,2, 何豫生2, 张峰会2, 韩士吉2, 董世迎2, 陈赓华2, 于洪伟2   

  1. 1 北京科技大学应用科学学院 北京 100083;
    2 中国科学院物理研究所 北京 100080
  • 收稿日期:2003-08-12 修回日期:2003-11-20 出版日期:2004-12-31 发布日期:2004-12-31
  • 作者简介:丁红胜(1969-),男,湖北麻城人,副教授,博士;何豫生(1945-),男,北京人,研究员,博导.
  • 基金资助:
    国家基金委首批大型仪器研制(19827001);北京科技大学科研专项发展基金(20030602290)资助项目

Research on a Scanning Superconducting Quantum Interference Device Microscope for Room Temperature Samples

DING Hong-sheng1,2, HE Yu-sheng2, ZHANG Feng-Hui2, HAN Shi-ji2, DONG Shi-ying2, CHEN Geng-hua2, YU Hong-wei2   

  1. 1. Applied Science School, Beijing University of Science and Technology, Beijing 100083, China;
    2. Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2003-08-12 Revised:2003-11-20 Online:2004-12-31 Published:2004-12-31

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摘要： 成功制备了用于室温样品磁测量的扫描SQUID显微镜.SQUID利用YBCO薄膜制成,并安装在双层杜瓦内胆的底部冷指端.为了提高系统的空间分辨率,杜瓦设计了特殊的微调装置和白宝石窗口.该显微镜可在无屏蔽环境中工作,其磁场灵敏度约为46pT/Hz1/2,空间分辨率优于500μm.利用该显微镜成功实现了室温样品的弱磁测量,并进行了无损检测的应用研究.

关键词: 无损检测, 高温超导量子干涉器, 磁测量, 显微镜

Abstract: We have constructed a scanning high-Tc superconducting quantum interference device (SQUID) microscope for room temperature samples, in which YBCO DC SQUID is mounted on the lower end of a copper rod and cooled to liquid nitrogen temperature. There is a 75 μm thick sapphire window under the SQUID. The microscope has a magnetic field sensitivity of 46pT/Hz1/2 in a magnetically unshielded environment and the spatial resolution is better than 500 μm. We have used this scanning SQUID microscope to measure various room temperature samples, especially for non-destructive evaluation.

Key words: SQUID, magnetism measurement, microscope, non-destructive evaluation (NDE)

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