Superconducting meander-line surface coil for NMR spectroscopy of nanoscale thin films
L. Beaudoin, A. Verrier, Y.A. Bioud, M. Massicotte, B. Reulet, J.A. Quilliam
DOI 10.1103/qhn7-3wv8 · Physical Review Applied
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Abstract
Nuclear magnetic resonance (NMR) spectroscopy is a powerful technique for the study of local magnetism in a variety of materials. However, the inherently low sensitivity of conventional inductively detected solid-state NMR typically requires a large number of spins, reducing its applicability to two-dimensional materials and nanoscale thin films. To overcome this experimental challenge, we introduce a probe based on a superconducting meander-line surface coil that significantly enhances the NMR sensitivity for thin samples. Using an NbN meander with an optimized geometry, we demonstrate the sensitivity of this technique by detecting the NMR signal of a 150-nm-thick boron film containing only approximately 2×101611B nuclear spins. Spin-echo measurements and theoretical modeling offer insight into the parameters limiting the performance of the coil. This work hopefully lays the foundation for developing highly sensitive NMR probes, potentially unlocking new opportunities for studying atomically thin materials.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NbN Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 14 | Pressure not reported | unknown |
| NbN Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12 | Pressure not reported | unknown |
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