Characterizing the Josephson Effect on Ba-122 Single-Crystal Junctions

Journal Article · Sun Sep 15 00:00:00 EDT 2019 · Journal of Superconductivity and Novel Magnetism

DOI:https://doi.org/10.1007/S10948-019-5033-4· OSTI ID:22922892

Reifert, D. ^[1]; Schmidt, S.; Schmidl, F.; Tympel, V. ^[2]; Wolf, T. ^[3]

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1. Physikalisch-Technische Bundesanstalt (PTB) (Germany)
2. Friedrich-Schiller-University Jena, Institute of Solid State Physics (Germany)
3. Karlsruhe Institute of Technology, Institute of Solid State Physics (Germany)

This paper presents c-direction hybrid Josephson junctions with base electrodes of Co:BaFe{sub 2}As{sub 2} single crystals. To realize Josephson junctions, it applies standard photolithography technologies and a newly developed surface polishing method that was used. As conventional isotropic s-wave superconductor counter electrodes used double layers of Pb/In. The artificial barrier for the tunneling junctions consists of a thin sputtered Ti layer or a thermally evaporated Al layer; both layers were used as an insulator barrier. For characterizing the Josephson effects with TiO{sub x} barrier, we could realize I{sub c}R{sub N} products of about 13.7 μV and unconventional I{sub c}-T dependencies. The formation of Shapiro steps under the influence of microwave irradiation and magnetic field to the junctions will be discussed as well.

• OSTI ID: 22922892
• Journal Information: Journal of Superconductivity and Novel Magnetism, Vol. 32, Issue 9; Conference: ICSM2018: 6. International Conference on Superconductivity and Magnetism, Antalya (Turkey), 29 Apr - 4 May 2018; Other Information: Copyright (c) 2019 Springer Science+Business Media, LLC, part of Springer Nature; Country of input: International Atomic Energy Agency (IAEA); ISSN 1557-1939
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ARSENIC COMPOUNDS
BARIUM COMPOUNDS
COBALT ADDITIONS
CRITICAL CURRENT
DOPED MATERIALS
IRON COMPOUNDS
JOSEPHSON EFFECT
JOSEPHSON JUNCTIONS
LAYERS
MAGNETIC FIELDS
MICROWAVE RADIATION
MONOCRYSTALS
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TUNNEL EFFECT