Enhancement of nuclear magnetic resonance in microtesla magnetic field with prepolarization field detected with high-Tc superconducting quantum interference device

Hong Chang Yang, Shu Hsien Liao, Herng Er Horng, Shing Ling Kuo, Hsin Hsien Chen, S. Y. Yang

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We applied prepolarization field and high-Tc superconducting quantum interference device (SQUID) detector to enhance nuclear magnetic resonance signal in a microtesla magnetic field. The minimum measuring magnetic field is 8.9 μT at which the proton resonance frequency is 380 Hz. The specificity instrumentation and the difficulty of using a high-Tc SQUID with prepolarization field were investigated. We applied gradient field to perform one-dimensional proton imaging in a microtesla magnetic field. Additionally, low field high-Tc SQUID-based NMR systems are promising in biomagnetic research due to its use, for example, in imaging with hyperpolarized noble gas.

Original languageEnglish
Article number252505
JournalApplied Physics Letters
Issue number25
Publication statusPublished - 2006 Jun 19


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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