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Descripción
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| Mo/Au bilayers are among the most suitable materials to be used as transition-edge sensors (TES) in cryogenic microcalorimeters and bolometers, developed, among other fields, for space missions. For this purpose the thermal stability of TES at temperatures below 150 ?C is a critical issue. We report on the dependence of functional properties (superconducting critical temperature, residual resistance and ) as well as on microstructure, chemical composition and interface quality for optimized high quality Mo/Au bilayers on annealing temperature and time. Data show that the functional properties of the bilayers remain stable at T < 150 ?C, but changes in microstructure, interface quality and functional properties were observed for layers heated at T ? 200 ?C. Microstructural and chemical composition data suggest that the measured changes in residual resistance ratio (RRR) and TC at T ? 200 ?C are mainly due to an increase in the average Au grain size and to Au migration along the Mo grain boundaries at the Au/Mo interface. A way to stabilize the functional properties of the Mo/Au bilayers against temperature enhancements is proposed. | |
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Internacional
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JCR del ISI
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Título de la revista
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Supercond. Science Technology |
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ISSN
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1361-6668 |
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Factor de impacto JCR
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Información de impacto
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Volumen
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25 |
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DOI
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10.1088/0953-2048/25/9/095001 |
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Número de revista
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Desde la página
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095001 |
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Hasta la página
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095001 |
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Mes
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SIN MES |
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Ranking
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