Title :
Far infrared measurements on YBCO films
Author :
Cunsolo, B. ; Dore, P. ; Kinder, H. ; Pullo, R. ; Tate, J.
Author_Institution :
Universita di Roma
Abstract :
We present far infrared measurements on YBCO films deposited on Si substrate. In particular, we measured the radiation intesity transmitted in the spectral range 50-550 cm/sup -1/ through two samples composed by YSCO films of different thickness deposited on the same Si substrate. With this procedure we derived the extinction coefficient of YBCO at temperatures above and below the critical temperature Tc. Above Tc the-data may be described by using -the Drude model. Below Tc the data are consistent with the results of the Mattis-Bardeen theory for the superconducting phase, by assuming an energy gap of about 250 cm/sup -1/.
Keywords :
Conductivity; Extinction coefficients; Image analysis; Semiconductor films; Substrates; Superconducting films; Superconducting transition temperature; Temperature measurement; Thickness measurement; Yttrium barium copper oxide;
Conference_Titel :
Millimeter Wave and Far-Infrared Technology, 1989. ICMWFT '89. International Conference on
Conference_Location :
Beijing, China
Print_ISBN :
0-87942-717-5
DOI :
10.1109/ICMWFT.1989.763754
