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Proceedings Paper

Comparison of AC laser calorimeter measurements with FTIR measurements of superconductors
Author(s): Etsuo Kawate; Mitsuo Koguchi; Zhen Wang; Yoshinori Uzawa; Kohtaro Isida
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Paper Abstract

The temperature dependence of the absorption of the thick niobium films was measured using an AC far-infrared laser calorimeter. Moreover the temperature and frequency dependences of the absolute transmission and reflection of same thin niobium nitride films were measured from 5 to 20 K and from 10 to 200 cm-1 using a fourier transform infrared spectrometer. The temperature dependencies of the skin depth and the absorptance determined independently by both methods are compared. However the skin depths and the absorptances agree well each other near and above Tc, they begin to deviate from each other with decreasing temperature below Tc.

Paper Details

Date Published: 11 October 2000
PDF: 12 pages
Proc. SPIE 4103, Optical Diagnostic Methods for Inorganic Materials II, (11 October 2000); doi: 10.1117/12.403588
Show Author Affiliations
Etsuo Kawate, National Research Lab. of Metrology (Japan)
Mitsuo Koguchi, Science Univ. of Tokyo (Japan)
Zhen Wang, Communications Research Lab. (Japan)
Yoshinori Uzawa, Communications Research Lab. (Japan)
Kohtaro Isida, Science Univ. of Tokyo (Japan)


Published in SPIE Proceedings Vol. 4103:
Optical Diagnostic Methods for Inorganic Materials II
Leonard M. Hanssen, Editor(s)

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