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Note: Commercial SQUID magnetometer-compatible NMR probe and its application for studying a quantum magnet

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Vennemann Tarek, Jeong Minki, Yoon Dongyoung, Magrez Arnaud, Berger Helmuth, Yang Lin, Živković Ivica, Babkevich Peter, Rønnow Henrik,
Project Harnessing Molecular Crystals for Quantum Magnets and Elucidating Quantum Critical Physics
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Original article (peer-reviewed)

Journal Review of Scientiic Instruments
Volume (Issue) 89
Page(s) 046101
Title of proceedings Review of Scientiic Instruments
DOI 10.1063/1.5023675


We present a compact nuclear magnetic resonance (NMR) probe which is compatible with a magnet of a commercial superconducting quantum interference device magnetometer and demonstrate its application to the study of a quantum magnet. We employ trimmer chip capacitors to construct an NMR tank circuit for low temperature measurements. Using a magnetic insulator MoOPO4 with S = 1/2 (Mo5+) as an example, we show that the T-dependence of the circuit is weak enough to allow the ligand-ion NMR study of magnetic systems. Our 31P NMR results are compatible with previous bulk susceptibility and neutron scattering experiments and furthermore reveal unconventional spin dynamics.