Sensitive J-coupling spectroscopy using high-Tc superconducting quantum interference devices in magnetic fields as low as microteslas

Shu Hsien Liao, Hong Chang Yang, Herng Er Horng, S. Y. Yang, H. H. Chen, Dennis W. Hwang, Lian Pin Hwang

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

In this work we present a sensitive J-coupling spectroscopy in one shot using high-Tc superconducting quantum interference devices and a flux transformer in microtesla fields. In the proposed NMR detection scheme the precession of proton spin was inductively coupled to the SQUID magnetometer. We enhanced the SNR signal and the spectral resolution significantly by applying a pre-polarization field of 0.045T. In microtesla fields where chemical shifts are absent, we demonstrate proton-phosphate coupling J3[H,P] = (10.94 0.08)Hz in trimethyl phosphate. The sensitive NMR spectrometer will be of great interest for diagnosis information of molecular structure and biological applications.

Original languageEnglish
Article number045008
JournalSuperconductor Science and Technology
Volume22
Issue number4
DOIs
Publication statusPublished - 2009 Jul 24

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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