Ultrasonic Attenuation in Current-Carrying Superconductors Containing Paramagnetic Impurities

An investigation is made of the ultrasonic attenuation in superconductors carrying persistent currents in the presence of paramagnetic impurity scattering. The limiting case of high impurity concentrations is considered. General expressions for the attenuation coefficients are obtained in the case of space independent sound waves. The attenuation coefficients at relatively low‐frequencies and low temperatures are evaluated explicitly. Gapless superconductors are also considered. [Russian Text Ignored.]