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All-MgB2 Josephson tunnel junctions

Year: 2005

Type: article

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 (IcRN product ∼0.8mV at 4.2 K), a well-defined superconducting gap (Δ=2.2–2.3mV), 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∼20K.

Source: Applied Physics Letters

DOI: 10.1063/1.1920411

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

Institutions: NTT (Japan), NTT Basic Research Laboratories, Tokyo University of Agriculture and Technology

Language: English

Topic: Superconductivity in MgB2 and Alloys

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W1872709757

FWCI: 7.745

Cites: 22

Cited by: 65

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