Investigation of Hafnium Thin Films for Design of TES Microcalorimeters.
作者信息
Safonova Victoria Yu, Gordeeva Anna V, Blagodatkin Anton V, Pimanov Dmitry A, Yablokov Anton A, Ermolaeva Olga L, Pankratov Andrey L
机构信息
Superconducting Nanoelectronics Laboratory, Nizhny Novgorod State Technical University n.a. R.E. Alekseev, Minin Street, 24, 603155 Nizhny Novgorod, Russia.
Institute for Physics of Microstructures of the Russian Academy of Sciences, Academicheskaya Street, 7, 603950 Nizhny Novgorod, Russia.
出版信息
Materials (Basel). 2023 Dec 30;17(1):222. doi: 10.3390/ma17010222.
Hafnium is a superconductor with a transition temperature slightly above 100 mK. This makes it attractive for such applications as microcalorimeters with high energy resolution. We report the superconducting properties of Hf films of thicknesses ranging from 60 to 115 nm, deposited on Si and AlO substrates by electron beam evaporation. Besides that, we fabricated and measured combinations of hafnium with thin layers of normal metals, decreasing the critical temperature by the proximity effect. The critical temperature of the studied films varied from 56 to 302 mK. We have observed a significant change in the critical temperature of some films over time, which we propose to prevent by covering hafnium films with a thin layer of titanium.
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