All-MgB2 Josephson tunnel junctions

K. Ueda; S. Saito; K. Semba; T. Makimoto; M. Naito

doi:10.1063/1.1920411

All-MgB₂ Josephson tunnel junctions

K. Ueda, S. Saito, K. Semba, T. Makimoto, M. Naito

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

60 Citations (Scopus)

Abstract

Sandwich-type all- MgB2 Josephson tunnel junctions (MgB2 AlOx MgB2) have been fabricated with as-grown MgB2 films formed by molecular-beam epitaxy. The junctions exhibit substantial superconducting current (Ic RN product ~0.8 mV at 4.2 K), a well-defined superconducting gap (Δ=2.2-2.3 mV), and clear Fraunhofer patterns. The superconducting gap voltage of Δ agrees well with the smaller gap in the multigap scenario. The results demonstrate that MgB2 has great promise for superconducting electronics that can be operated at T~20 K.

Original language	English
Article number	172502
Pages (from-to)	1-3
Number of pages	3
Journal	Applied Physics Letters
Volume	86
Issue number	17
DOIs	https://doi.org/10.1063/1.1920411
Publication status	Published - 2005 Apr 25
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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abstract = "Sandwich-type all- MgB2 Josephson tunnel junctions (MgB2 AlOx MgB2) have been fabricated with as-grown MgB2 films formed by molecular-beam epitaxy. The junctions exhibit substantial superconducting current (Ic RN product ~0.8 mV at 4.2 K), a well-defined superconducting gap (Δ=2.2-2.3 mV), and clear Fraunhofer patterns. The superconducting gap voltage of Δ agrees well with the smaller gap in the multigap scenario. The results demonstrate that MgB2 has great promise for superconducting electronics that can be operated at T~20 K.",

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AU - Ueda, K.

AU - Saito, S.

AU - Semba, K.

AU - Makimoto, T.

AU - Naito, M.

PY - 2005/4/25

Y1 - 2005/4/25

N2 - Sandwich-type all- MgB2 Josephson tunnel junctions (MgB2 AlOx MgB2) have been fabricated with as-grown MgB2 films formed by molecular-beam epitaxy. The junctions exhibit substantial superconducting current (Ic RN product ~0.8 mV at 4.2 K), a well-defined superconducting gap (Δ=2.2-2.3 mV), and clear Fraunhofer patterns. The superconducting gap voltage of Δ agrees well with the smaller gap in the multigap scenario. The results demonstrate that MgB2 has great promise for superconducting electronics that can be operated at T~20 K.

AB - Sandwich-type all- MgB2 Josephson tunnel junctions (MgB2 AlOx MgB2) have been fabricated with as-grown MgB2 films formed by molecular-beam epitaxy. The junctions exhibit substantial superconducting current (Ic RN product ~0.8 mV at 4.2 K), a well-defined superconducting gap (Δ=2.2-2.3 mV), and clear Fraunhofer patterns. The superconducting gap voltage of Δ agrees well with the smaller gap in the multigap scenario. The results demonstrate that MgB2 has great promise for superconducting electronics that can be operated at T~20 K.

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