Mixed-State Ultrasonic Attenuation in Clean Niobium
Recently there has been much theoretical1–4 and experimental5–7 interest in the ultrasonic attenuation coefficient in the mixed state of clean type-II superconductors. In this paper we present measurements of the attenuation near the upper critical field with the purpose of testing theoretical predictions regarding frequency dependence and propagation geometries.
KeywordsTransverse Wave Frequency Dependence Ultrasonic Attenuation Correct Ratio Magnetic Field Magnitude
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