Title :
Optical response of superconducting Nd/sub 1.85/Ce/sub 0.15/CuO/sub 4-y/ and YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// thin films
Author :
Bhattacharya, S. ; Mao, S.N. ; Rajeswari, M. ; Jiang, W. ; Venkatesan, T.
Author_Institution :
Dept. of Phys., Maryland Univ., College Park, MD, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
The normal state and transition edge optical response of epitaxial thin films of n-type superconductor Nd/sub 1.85/Ce/sub 0.15/CuO/sub 4-y/ has been measured. In contrast to the optical response of p-type superconductors such as YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// the normal state optical response of these films were not proportional to the temperature derivative of the resistance. The normal state optical response of films with different transition temperature (and, therefore, different oxygen content) were also remarkably different from each other. We attribute the observation of anomalous optical response to the possible presence of photoconductivity in Nd/sub 1.85/Ce/sub 0.15/CuO/sub 4-y/. We also discuss the feasibility of fabricating bolometers based on superconducting p-n bilayers.<>
Keywords :
barium compounds; cerium compounds; high-temperature superconductors; neodymium compounds; photoconductivity; superconducting epitaxial layers; yttrium compounds; Nd/sub 1.85/Ce/sub 0.15/CuO/sub 4-y/; Nd/sub 1.85/Ce/sub 0.15/CuO/sub 4/; YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta//; YBa/sub 2/Cu/sub 3/O/sub 7/; bolometers; epitaxial thin films; n-type superconductor; normal state; optical response; oxygen content; p-type superconductor; photoconductivity; resistance; superconducting p-n bilayers; temperature derivative; transition edge; transition temperature; Josephson junctions; Neodymium; Optical films; Superconducting devices; Superconducting epitaxial layers; Superconducting films; Superconducting materials; Superconducting thin films; Superconducting transition temperature; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
