High quality Nb/Al-AlOx/Nb superconducting tunnel junctions for radiation detection

K. Joosse; H. Nakagawa; H. Akoh; S. Takada; K. Maehata; K. Ishibashi

doi:10.1063/1.116597

High quality Nb/Al-AlOx/Nb superconducting tunnel junctions for radiation detection

K. Joosse, H. Nakagawa, H. Akoh, S. Takada, K. Maehata, K. Ishibashi

Applied Nuclear Physics

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

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
Pages (from-to)	702-704
Number of pages	3
Journal	Applied Physics Letters
Volume	68
Issue number	5
DOIs	https://doi.org/10.1063/1.116597
Publication status	Published - Dec 1 1996

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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AU - Joosse, K.

AU - Nakagawa, H.

AU - Akoh, H.

AU - Takada, S.

AU - Maehata, K.

AU - Ishibashi, K.

PY - 1996/12/1

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AB - 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.

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High quality Nb/Al-AlOx/Nb superconducting tunnel junctions for radiation detection

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