Journal
NANOMATERIALS
Volume 12, Issue 23, Pages -Publisher
MDPI
DOI: 10.3390/nano12234155
Keywords
aluminum Josephson junctions; hybrid ferromagnetic Josephson junction; quantum computing applications
Categories
Funding
- EffQul-Efficient integration of hybrid quantum devices
- SQUAD-On-chip control and advanced read-out for superconducting qubit arrays [E59C20001010005]
- Programma STAR PLUS 2020, Finanziamento della Ricerca di Ateneo, University of Napoli Federico II
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This paper reports the fabrication and characterization of high-quality ferromagnetic Josephson junctions based on aluminum technology. The innovative fabrication process allows the obtained hybrid aluminum Josephson junctions to have very high quality, supporting the application of ferromagnetic Josephson junctions in advanced quantum circuits.
Aluminum Josephson junctions are the building blocks for the realization of superconducting quantum bits. Attention has been also paid to hybrid ferromagnetic Josephson junctions, which allow switching between different magnetic states, making them interesting for applications such as cryogenic memories, single-photon detectors, and spintronics. In this paper, we report on the fabrication and characterization of high-quality ferromagnetic Josephson junctions based on aluminum technology. We employed an innovative fabrication process inspired by niobium-based technology, allowing us to obtain very high-quality hybrid aluminum Josephson junctions; thus, supporting the use of ferromagnetic Josephson junctions in advanced quantum circuits. The fabrication process is described in detail and the main DC transport properties at low temperatures (current-voltage characteristic, critical current as a function of the temperature, and the external magnetic field) are reported. Here, we illustrate in detail the fabrication process, as well as the main DC transport properties at low temperatures (current-voltage characteristic, critical current as a function of the temperature, and the external magnetic field).
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