Ultrasonic Propagation in High-Field Superconductors

Abstract

In the last few years a new class of superconducting materials whose superconducting-to-normal transition at T = 0 °K occurs at ~10⁵ G have been discovered (¹). To date only a few experimental studies of ultrasonic propagation in such high-field superconductors (hereafter HFS) have been reported. The results of these studies led to the formulation of a phenomenological theory which appears to be successful in describing quantitatively, and without the use of adjustable parameters, the observed attenuation and velocity changes (⁹). A microscopic theory for sound propagation in HFS is not available at the present time.

Supported by the U. S. Air Force Office of Scientific Research.