中文

Journal of Applied Sciences ›› 2004, Vol. 22 ›› Issue (4): 528-532.

• Articles • Previous Articles     Next Articles

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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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)

CLC Number: