Objective
Superconductivity above the temperature of liquid nitrogen in the YBa2Cu3O7 family (YBCO) compounds, and more generally in high-Tc superconducting oxides (HTSO), allows the development of superconducting electronics working at reasonable temperature. Subsequent improvement of electronic properties, such as very fast circuits, may be of importance for information technology and microelectronics. The fundamental building block of most superconducting microelectronic devices involved in information technology is the Josephson junction.
The goals of this project were to:
- fabricate reproducible superconducting HTSO thin films using promising and complementary techniques (sputtering, electron-beam coevaporation, molecular beam epitaxy and laser ablation); high level characterisation was to be used for the optimisation of the growth process
- fabricate and characterise (structural and electrical properties) intrinsic Josephson junctions
- demonstrate simple devices using intrinsic Josephson junctions and a Superconducting Quantum Interference Device (SQUID).
The goals of this project were to: fabricate reproducible superconducting high critical temperature (Tc) superconducting oxides (HTSO) thin films using promising and complementary techniques (sputtering, electron beam coevaporation, molecular beam epitaxy and laser ablation), High level characterization was to be used for the optimization of the growth process; fabrication and characterize (structural and electrical properties) intrinsic Josephson junctions; demonstrate simple devices using intrinsic Josephson junctions and a superconducting quantum interference device (SQUID).
Several results were obtained: development of 2 types of active oxygen sources based on direct current driven and radio frequency driven electron cyclotron plasma techniques, as deposited superconducting thin films using atomic plane by atomic plane growth in an molecular beam expitaxy (MBE) machine (best result on yttrium barium copper oxide (YBCO), coevaporated, sputtered or laser ablated thin films wilth more than 2E10 A m{-2} at 77 K and Tc in the 90 K range on various substrates, sputtered and laser ablated thin films with c-axis in the plane of the substrate (best minimum yield in Rutherford backscattering channelling), development of enabling technologies for low contact resistance and patterning, development of submicron patterning (0.15 micron) by electron beam lithography and ion beam etching, and by focused ion beam, realization of SNIS Josephson junctions operating at 4.2 K and superconductor normal metal superconductor (SNS) operating at 77 K, fabrication of many SQUID on the same chip exhibiting characteristics (Ic and Rnlc product) in a narrow window and finally simulation of basic gates and circuits.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- engineering and technology electrical engineering, electronic engineering, information engineering information engineering telecommunications radio technology radio frequency
- natural sciences physical sciences theoretical physics particle physics particle accelerator
- engineering and technology materials engineering coating and films
- natural sciences physical sciences optics laser physics
- natural sciences physical sciences electromagnetism and electronics superconductivity
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Coordinator
91404 Orsay
France
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.