This title appears in the Scientific Report :
2009
Please use the identifier:
http://dx.doi.org/10.1109/TASC.2009.2019560 in citations.
High-Performance Low-Field NMR Utilizing a High-Tc rf SQUID
High-Performance Low-Field NMR Utilizing a High-Tc rf SQUID
High-resolution low-field nuclear magnetic resonance (NMR) signals of selected liquid samples were recorded using a nitrogen-cooled superconducting quantum interference device (SQUID). The NMR measurements were performed at Larmor frequencies (f(L)) from 2 Hz to 40 kHz. The natural spectral linewidt...
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Personal Name(s): | Qiu, L. Q. |
---|---|
Zhang, Y. / Krause, H.-J. / Braginski, A. I. / Tanaka, S. / Offenhäusser, A. | |
Contributing Institute: |
Institut für Bio- und Nanosysteme - Bioelektronik; IBN-2 JARA-FIT; JARA-FIT |
Published in: | IEEE transactions on applied superconductivity, 19 (2009) S. 831 - 834 |
Imprint: |
New York, NY
IEEE
2009
|
Physical Description: |
831 - 834 |
DOI: |
10.1109/TASC.2009.2019560 |
Document Type: |
Journal Article |
Research Program: |
Grundlagen für zukünftige Informationstechnologien |
Series Title: |
IEEE Transactions on Applied Superconductivity
19 |
Subject (ZB): | |
Publikationsportal JuSER |
High-resolution low-field nuclear magnetic resonance (NMR) signals of selected liquid samples were recorded using a nitrogen-cooled superconducting quantum interference device (SQUID). The NMR measurements were performed at Larmor frequencies (f(L)) from 2 Hz to 40 kHz. The natural spectral linewidth of tap water could be measured in magnetic fields below 7 microtesla. To demonstrate the measurement sensitivity and resolution, J-coupling spectra of 2,2,2-trifluoroethanol were recorded at different measurement fields, with signals separated by several hundreds of Hertz. An additional nitrogen-cooled tuned LC-circuit and a signal recovery procedure involving a pi/2 AC pulse were applied in the higher f(L) region (>10 kHz) to enhance the signal-to-noise ratio up to one order of magnitude. |