Abstract
Nb/Al-AlOx/Nb tunnel junctions designed for x-ray detection have been manufactured and characterized at temperatures down to 0.35 K. At a bias voltage of 0.5 mV, a leakage current of the order of 0.1 pA/μm2, and a dynamic resistance exceeding 106 times the normal state resistance, were achieved in junctions with dimensions up to 200×200 μm2 and critical current densities of order 200 A/cm2. The combination of high critical current density, low leakage current, and large area represents an important step towards the development of superconducting tunnel junction detectors with improved spectroscopic performance.
Original language | English |
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Pages (from-to) | 702-704 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 68 |
Issue number | 5 |
DOIs | |
Publication status | Published - 1996 |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)