Simple single-coil double resonance NMR probe for solid state studies

A single-coil (solenoid), nuclear magnetic double resonance sample probe, suited for a wide variety of solid state studies, is described. It was designed to be used in double resonance experiments where it is necessary to generate intense rf magnetic fields (rotating components with amplitudes ∼50 G) at two widely spaced frequencies and simultaneously to detect microvolt-level signals. Designs for operation over the 12–270 MHz frequency range are discussed.