Superconducting Quantum Interference Device (SQUID) microsusceptometers have been widely used to study magnetic properties of materials at microscale. As intrinsically balanced devices, they could also be exploited for direct SQUID-detection of nuclear magnetic resonance (NMR) from micron sized samples, or for SQUID readout of mechanically detected NMR from submicron sized samples. Here, we demonstrate a double balancing technique that enables achievement of very low residual imbalance of a SQUID microsusceptometer over a wide bandwidth. In particular, we can generate ac magnetic fields within the SQUID loop as large as 1 mT, for frequencies ranging from dc up to a few MHz. As an application, we demonstrate direct detection of NMR from 1H spins in a glycerol droplet placed directly on top of the 20 μm SQUID loops.

Superconducting quantum interference device microsusceptometer balanced over a wide bandwidth for nuclear magnetic resonance applications / Vinante, A.; Mezzena, R.; Falferi, P.. - In: REVIEW OF SCIENTIFIC INSTRUMENTS. - ISSN 0034-6748. - 85:10(2014), p. 103909. [10.1063/1.4898177]

Superconducting quantum interference device microsusceptometer balanced over a wide bandwidth for nuclear magnetic resonance applications

Vinante A.;Mezzena R.;
2014-01-01

Abstract

Superconducting Quantum Interference Device (SQUID) microsusceptometers have been widely used to study magnetic properties of materials at microscale. As intrinsically balanced devices, they could also be exploited for direct SQUID-detection of nuclear magnetic resonance (NMR) from micron sized samples, or for SQUID readout of mechanically detected NMR from submicron sized samples. Here, we demonstrate a double balancing technique that enables achievement of very low residual imbalance of a SQUID microsusceptometer over a wide bandwidth. In particular, we can generate ac magnetic fields within the SQUID loop as large as 1 mT, for frequencies ranging from dc up to a few MHz. As an application, we demonstrate direct detection of NMR from 1H spins in a glycerol droplet placed directly on top of the 20 μm SQUID loops.
2014
10
Vinante, A.; Mezzena, R.; Falferi, P.
Superconducting quantum interference device microsusceptometer balanced over a wide bandwidth for nuclear magnetic resonance applications / Vinante, A.; Mezzena, R.; Falferi, P.. - In: REVIEW OF SCIENTIFIC INSTRUMENTS. - ISSN 0034-6748. - 85:10(2014), p. 103909. [10.1063/1.4898177]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/239220
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