Two-Phonon Absorption in Ultrasonic Paramagnetic Resonance of Uranium-Doped Calcium Fluoride

15 May 1967

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 18 (20) , 841-844
https://doi.org/10.1103/physrevlett.18.841

Abstract

We have investigated spin-lattice interactions in uranium-doped calcium fluoride at 4.2°K using the method of ultrasonic paramagnetic resonance. We present results of the measurement of the attenuation of 9-GHz longitudinal elastic waves due to the absorption of two phonons by each paramagnetic ion as a function of ultrasonic intensity and angle between the applied magnetic field and the ion symmetry axis, as well as observation of one-, three-, four-, and five-phonon absorption processes.

Keywords

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