Spin-Phonon Interactions in Metals and Antiferromagnetic Insulators.

The research performed in this laboratory is primarily concerned with the interaction of ultrasound with nuclear and electron spins in solids. The present report describes (1) the detailed studies made under the contract of the elastic, magneto-elastic, F19 nuclear acoustic resonance and Mn19 nuclear acoustic resonance in the cubic antiferromagnet, RbMnF3; and (2) the study, as a function of temperature, of the anomalies in the elastic properties and nuclear acoustic resonance in bcc metal crystals.