Nuclear Magnetic Resonance Modes in Magnetic Materials. II. Experiment

Abstract
As shown theoretically in a previous paper, the indirect coupling of nuclei through spin waves in ordered magnetic materials can give rise to a mixing of the nuclear-electronic resonance modes. The results of an experimental investigation of this effect in antiferromagnetic KMnF3 are described. The mixing of modes permits Mn55 nuclear magnetic resonance absorption to be detected indirectly by monitoring the antiferromagnetic resonance. Such nuclear absorption has been observed for a range of frequencies between 570 and 685 Mc/sec at 4.2°K.