Reference

J.A. Stringer, C.E. Bronnimann, C.G. Mullen, D.H. Zhou, S.A. Stellfox, Y. Li, E.H. Williams, C.M. Rienstr
Reduction of RF-induced sample heating with a scroll coil resonator structure for solid-state NMR probes.
J. Magn. Reson. 173(4):40-48 (2005).