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Detection of nuclear magnetic resonance in the microtesla range using a high Tc dc-superconducting quantum interference device

Li Shao Ren Yu-Feng Tian Ye Chu Hai-Feng Li Song-Lin Chen Ying-Fei Li Jie Chen Geng-Hua Zheng Dong-Ning Wang Ning

Detection of nuclear magnetic resonance in the microtesla range using a high Tc dc-superconducting quantum interference device

Li Shao, Ren Yu-Feng, Tian Ye, Chu Hai-Feng, Li Song-Lin, Chen Ying-Fei, Li Jie, Chen Geng-Hua, Zheng Dong-Ning, Wang Ning
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  • Received Date:  23 December 2008
  • Accepted Date:  06 January 2009
  • Published Online:  05 April 2009

Detection of nuclear magnetic resonance in the microtesla range using a high Tc dc-superconducting quantum interference device

  • 1. (1)中国科学院物理研究所北京凝聚态物理国家实验室,北京 100190; (2)中国科学院物理研究所北京凝聚态物理国家实验室,北京 100190;长春理工大学物理系,长春 130022

Abstract: We have carried out nuclear magnetic resonance experiments in microtesla range.The free induction signal was recorded using a high Tc dc-superconducting quahtum interference device.The measurement was performed in a home-made magnetic shield room.Resonance spectra of 1H from a sample of 15 ml tap water was obtained in the field range from 7—70 μT,corresponding to resonance frequency of 300—3000 Hz,The signal to noise ratio in a single-shot measurement is around 4,which could be increased to about 40 after 100 times averaging.The effect of residual magnetic field in the shield room, prepolarization time and data acquisition time was investigated.

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