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Influence of a dc heat flux on the velocity of second sound nearT

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Abstract

We have measured the speed of second soundu 2 in He II in the presence of a heat fluxQ. ForT −1 mK>T>T −3.5 mK it is found thatu 2 reduces linearly withQ 2, for 2 mW/cm2<Q<6 mW/cm2. By extrapolating the data we have deduced that the lambda transition temperature reduces linearly withQ.

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Bhagat, S.M., Davis, R.S. Influence of a dc heat flux on the velocity of second sound nearT . J Low Temp Phys 7, 157–167 (1972). https://doi.org/10.1007/BF00629126

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  • DOI: https://doi.org/10.1007/BF00629126

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