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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

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5 Author(s)
S. Bhattacharya ; Dept. of Phys., Maryland Univ., College Park, MD, USA ; S. N. Mao ; M. Rajeswari ; W. Jiang
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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.<>

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IEEE Transactions on Applied Superconductivity  (Volume:5 ,  Issue: 2 )