注意：商用与超导量子干涉仪（SQUID）磁力计兼容的核磁共振（NMR）探头及其在研究量子磁体中的应用。

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

作者信息

Vennemann T, Jeong M, Yoon D, Magrez A, Berger H, Yang L, Živković I, Babkevich P, Rønnow H M

机构信息

Laboratory for Quantum Magnetism, Institute of Physics, Ecole Polytechnique Féderale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.

Laboratory of the Physics of Nanostructured Materials, Institute of Physics, Ecole Polytechnique Féderale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.

出版信息

Rev Sci Instrum. 2018 Apr;89(4):046101. doi: 10.1063/1.5023675.

DOI:10.1063/1.5023675

PMID:29716319

Abstract

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 MoOPO with S = 1/2 (Mo) 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 P NMR results are compatible with previous bulk susceptibility and neutron scattering experiments and furthermore reveal unconventional spin dynamics.

摘要

我们展示了一种紧凑的核磁共振（NMR）探头，它与商用超导量子干涉器件磁力计的磁体兼容，并展示了其在量子磁体研究中的应用。我们使用微调芯片电容器构建用于低温测量的NMR振荡电路。以具有S = 1/2（Mo）的磁性绝缘体MoOPO为例，我们表明该电路的温度依赖性足够弱，足以允许对磁性系统进行配体离子NMR研究。我们的P NMR结果与先前的体磁化率和中子散射实验结果相符，并且进一步揭示了非常规的自旋动力学。