中国物理B ›› 2002, Vol. 11 ›› Issue (11): 1135-1139.doi: 10.1088/1009-1963/11/11/308

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A scanning superconducting quantum interference device microscope for room temperature samples

张峰会1, 韩士吉1, 董世迎1, 于洪伟1, 陈赓华1, 何豫生1, 颜晓明2, 丁红胜3   

  1. (1)Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; (2)Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China; (3)Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China; Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; Graduate School, Chinese Academy of Sciences, Beijing 100080, China; Department of
  • 收稿日期:2002-06-07 修回日期:2002-07-05 出版日期:2002-11-12 发布日期:2005-06-12
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 19827001).

A scanning superconducting quantum interference device microscope for room temperature samples

Ding Hong-Sheng (丁红胜)abcd, Zhang Feng-Hui (张峰会)b, Yan Xiao-Ming (颜晓明)a, Han Shi-Ji (韩士吉)b, Dong Shi-Ying (董世迎)b, Yu Hong-Wei (于洪伟)b, Chen Geng-Hua (陈赓华)b, He Yu-Sheng (何豫生)b   

  1. a Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China; b Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; c Graduate School, Chinese Academy of Sciences, Beijing 100080, China; d Department of Physcs, University of Science and Technology, Beijing 100083, China
  • Received:2002-06-07 Revised:2002-07-05 Online:2002-11-12 Published:2005-06-12
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 19827001).

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摘要： We have constructed a scanning low-Tc superconducting quantum interference device (SQUID) microscope, in which the SQUID is mounted on the lower end of a copper rod and cooled to liquid helium temperature. There is a 65μm thick sapphire window under the SQUID. The sample at room temperature underneath the window can be scanned to produce magnetic images. The microscope has a spatial resolution of 100－150μm and a magnetic field sensitivity of 3－60pT/$\sqrt{Hz}$ in a magnetically unshielded environment. We have used this scanning SQUID microscope to measure various room temperature samples.

Abstract: We have constructed a scanning low-Tc superconducting quantum interference device (SQUID) microscope, in which the SQUID is mounted on the lower end of a copper rod and cooled to liquid helium temperature. There is a 65μm thick sapphire window under the SQUID. The sample at room temperature underneath the window can be scanned to produce magnetic images. The microscope has a spatial resolution of 100－150μm and a magnetic field sensitivity of 3－60pT/$\sqrt{Hz}$ in a magnetically unshielded environment. We have used this scanning SQUID microscope to measure various room temperature samples.

Key words: SQUID, microscope, magnetism measurement

中图分类号:  (Superconducting quantum interference devices (SQUIDs))

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