%0 Journal Article
%A Qiu, L.
%A Zhang, Y.
%A Krause, H.-J.
%A Braginski, A. I.
%A Burghoff, M.
%A Trahms, L.
%T Nuclear magnetic resonance in the earth's magnetic field using a nitrogen-cooled superconducting quantum interference device
%J Applied physics letters
%V 91
%@ 0003-6951
%C Melville, NY
%I American Institute of Physics
%M PreJuSER-59558
%P 072505
%D 2007
%Z Record converted from VDB: 12.11.2012
%X The authors recorded nuclear magnetic resonance (NMR) spectra of water, benzene, fluorobenzene, and 2,2,2-trifluoroethanol in the earth's magnetic field (EMF) using a nitrogen-cooled superconducting quantum interference device (SQUID). In trifluoroethanol, the broadband detection characteristics of the SQUID with a noise floor of about 70 fT/root Hz enabled authors to simultaneously observe fluorine and proton spectra at 1940 and 2060 Hz Larmor frequency, reflecting their heteronuclear J coupling in the high-field limit without showing a measurable chemical shift. To reduce the noise in EMF-NMR, the authors suggest the use of frequency-adjusted averaging, which compensates line broadening due to EMF fluctuations. (C) 2007 American Institute of Physics.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000248866600064
%R 10.1063/1.2771060
%U https://juser.fz-juelich.de/record/59558