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Updated: Jun 27, 2026

High-Temperature and High-Pressure In situ Magic Angle Spinning Nuclear Magnetic Resonance Spectroscopy
Published on: October 9, 2020
Benchtop High-MAS NMR for Paramagnetic Materials
Raiker Witter1,2,3,4, Andres Oss1, Radostina Stoyanova5
1Laboratory of Spin Design, Department of Cybernetics, Tallinn University of Technology (TalTech), Ehitajate tee 5, 19086 Tallinn, Estonia.
None:
We report a compact benchtop solid-state NMR platform that achieves 50 kHz magic-angle spinning (MAS) in a 1.4 T permanent magnet with an 18 mm bore, enabling high-speed MAS under extremely space-constrained conditions. The probe architecture leverages field-bore orthogonality for convenient magic-angle alignment and is demonstrated with miniaturized 1.8 mm rotors (≈5 mm length) at stable high-speed operation. As a demanding test case, we measure 7Li MAS NMR of the paramagnetic layered cathode oxide LiNi0.5Mn0.5O2, where hyperfine interactions produce very large paramagnetic shifts spanning the several-thousand-ppm regime. Overall, the results establish a path toward portable, cost-effective high-MAS NMR in compact permanent-magnet geometries.
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