Thermoelastic Effect in Niobium at the Superconducting Transition

descriptionPublicationkeyboard_double_arrow_right Article 09 Aug 1982 English Publisher:American Physical Society (APS)Journal:Physical Review Letters, volume 49, pages 375-378 (issn: 0031-9007,

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Authors: D. G. Blair; J. Ferreirinho;

doi: 10.1103/physrevlett.49.375

Thermoelastic Effect in Niobium at the Superconducting Transition

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Abstract

An abrupt decrease in acoustic loss Q/sup -1/ has been observed in flexural modes of polycrystalline Nb disk samples on cooling through the superconducting transition temperature T/sub c/. High-resolution measurements on a 1.6-kHz mode of one sample showed a 30% decrease in Q/sup -1/ in a 20-mK temperature interval. It is shown that these results are clearly identifiable with the reduction of the thermoelastic contribution to the acoustic loss in the superconducting state.

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