INFLUENCE OF IMPURITIES AND DISLOCATIONS ON ULTRASONIC ATTENUATION IN COPPER AND DILUTE COPPER ALLOYS AT LOW TEMPERATURES
- P. Schrey
- J. Schulz
- H. Schmidt
- D. Lenz
DOIAbstract
We have measured the phonon-electron attenuation αPE (10) in Cu single crystals of widely different purity (20<RRR<20.000) after suppression of dislocation damping by γ-irradiation. The αPE-data are in agreement with Pippard's theory. The measurements on crystals doped with paramagnetic impurities (Fe,Mn) show an "ultrasonic Kondo-effect"
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