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Low Temperature Vibrating Reed Measurements of Zr Based Metallic Glasses

並列摘要


Vibrating reed measurements of the superconducting metallic glasses Zr59Ti3Cu20Ni8Al10 and Zr65Al7.5Cu27.5 are carried out in order to illuminate the influence of conduction electrons on the density of states of atomic tunneling systems, which dominate the low-temperature thermal and acoustic properties of disordered solids. The overall behavior of the two glasses is very similar and consistent with earlier experiments underlining the notion that the standard assumptions of the tunneling model are insufficient in the case of disordered metals. A quantitative comparison of the results reveal that the density of states of tunneling systems in the splat-cooled alloy Zr65Al7.5Cu27.5 is about twice as high as in the bulk metallic glass Zr59Ti3Cu20Ni8Al10.

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