DEGREE OF ORDER IN QUENCH-CONDENSED ALLOYS STUDIED BY RESISTIVITY AND THE PHONON SPECTRUM FROM TUNNELLINGReport as inadecuate




DEGREE OF ORDER IN QUENCH-CONDENSED ALLOYS STUDIED BY RESISTIVITY AND THE PHONON SPECTRUM FROM TUNNELLING - Download this document for free, or read online. Document in PDF available to download.



Abstract : The shape of phonon induced structure in superconductive tunnelling curves could be used to classify the degree of structural order in lead alloy films. The films were condensed at 0.4 K and studied as deposited and after anneals to 30, 100 and 300 K. Temperatures of transformation from one state to another could be identified with those where steps occurred in resistance vs. temperature curves. These temperatures scale with the melting points of the pure solutes. Localized phonon modes could be observed in PbIn only, and solely in films with relatively large grains. It is difficult to explain why no impurity modes are seen in PbSn.





Author: T. Claeson C. Granqvist

Source: https://hal.archives-ouvertes.fr/



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