This title appears in the Scientific Report :
2009
Please use the identifier:
http://dx.doi.org/10.1016/j.physc.2009.05.085 in citations.
Overview of low-field NMR measurements using HTS rf-SQUIDs
Overview of low-field NMR measurements using HTS rf-SQUIDs
High-resolution low-field nuclear magnetic resonance (LF-NMR) investigations of liquid samples, recorded using a HTS radio frequency (rf) superconducting quantum interference device (SQUID) are overviewed in this paper. The measurements were performed either in a magnetically shielded room (MSR) or...
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Personal Name(s): | Zhang, Y. |
---|---|
Qiu, L. Q. / Krause, H.-J. / Dong, H. / Braginski, A. I. / Tanaka, S. / Offenhäusser, A. | |
Contributing Institute: |
Institut für Bio- und Nanosysteme - Bioelektronik; IBN-2 JARA-FIT; JARA-FIT |
Published in: | Physica / C, 469 (2009) |
Imprint: |
Amsterdam
North-Holland Physics Publ.
2009
|
DOI: |
10.1016/j.physc.2009.05.085 |
Document Type: |
Journal Article |
Research Program: |
Grundlagen für zukünftige Informationstechnologien |
Series Title: |
Physica C
469 |
Subject (ZB): | |
Publikationsportal JuSER |
High-resolution low-field nuclear magnetic resonance (LF-NMR) investigations of liquid samples, recorded using a HTS radio frequency (rf) superconducting quantum interference device (SQUID) are overviewed in this paper. The measurements were performed either in a magnetically shielded room (MSR) or in the Earth's Magnetic Field (EMF). in MSR, measurements with Larmor frequencies (f(L)) ranging from 2 Hz to 40 kHz were demonstrated. The natural spectral linewidth of water and the scalar coupling spectra of 2,2,2-trifluoroethanol and of fluorobenzene were determined. An additional nitrogen-cooled resonant LC input circuit was also introduced in higher f(L) (>10 kHz) region to enhance the signal-to-noise ratio up to an order of magnitude, The influence of the speed of decay of the polarizing magnetic field (B-p) on the free-induction-decay (FID) signal was analyzed quantitatively. In EMF, NMR spectra of different liquid samples were recorded. To compensate the line broadening due to EMF fluctuations we used frequency-adjusted averaging. (C) 2009 Elsevier B.V. All rights reserved. |