Ultrasonic attenuation of surface acoustic waves in a thin film of superconducting Nb3Sn |
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| Authors: | HP Fredricksen HL Salvo M Levy RH Hammond TH Geballe |
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| Institution: | 1. Physics Department, University of Wisconsin-Milwaukee, Milwaukee, WI 53201, USA;2. W.W. Hansen Laboratory of Physics, Stanford University, Palo Alto, CA 94305, USA |
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| Abstract: | The attenuation of 660 MHz surface acoustic waves propagating in a thin film of Nb3Sn 5000 Å thick has been measured as a function of temperature from 4.2 K to 16 K. The A 15 Nb3Sn, electron-beam codeposited on YZ lithium niobate and annealed at 700°C, was studied using 5.1 μm wavelength interdigital electrodes. The film revealed a transition temperature of 14.2 ± 0.1 K and using the BCS theory, an energy gap 2Δ(0) = 3.5 kBTc. |
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