Current Induced Hotspot in Superconducting Thin Films with Different Thicknesses
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概要
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The temperature T. dependence of current density j at the boundary of hotspothas been measured for granular aluminum thin films immersed in superfluidhelium, whose temperature is T.. The thickness d dependence of j-T. charac-teristics, shows that the heat transfer from hotspot to superfluid helium, is almostlimited by the thermal resistance between the electrons and lattice for thin films,d= 14 and 28 nm. But, for a thicker film, d= 112 nm, the Kapitza resistance mustbe considered in addition to the above thermal resistance.Close to the superconducting transition temperature T., a finite region of T. inwhich j is proportional to (7'. -T.)"', has been found. This characteristic isexplained by theoretical results derived under the assumption that Joule heatingdepends not only on current density but also on temperature of the electrons.
- 社団法人日本物理学会の論文
- 1984-04-15
著者
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Mizuno Kazuo
Research Institute Of Fundamental Information Science Kyushu University 33
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Mizuno Kazuo
Research Institute Of Fundamental Information Science Kyushu University
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Aomine Takafumi
Research Institute Of Fundamental Information Science Faculty Of Science Kyushu University
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Aomine Takafumi
Research Institute Of Fundamental Information Science Kyushu University 33
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