Search Results - "Villegier, J"

Study of nanometric superconducting multilayers for RF field screening applications by Antoine, C. Z., Villegier, J.-C., Martinet, G.

“…Vortex penetration severely limits high field performances in bulk niobium RF cavities for accelerators. To reach higher fields, Gurevich [Appl. Phys. Lett…”
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European roadmap on superconductive electronics – status and perspectives by Anders, S., Blamire, M.G., Buchholz, F.-Im, Crété, D.-G., Cristiano, R., Febvre, P., Fritzsch, L., Herr, A., Il’ichev, E., Kohlmann, J., Kunert, J., Meyer, H.-G., Niemeyer, J., Ortlepp, T., Rogalla, H., Schurig, T., Siegel, M., Stolz, R., Tarte, E., ter Brake, H.J.M., Toepfer, H., Villegier, J.-C., Zagoskin, A.M., Zorin, A.B.

“…For four decades semiconductor electronics has followed Moore’s law: with each generation of integration the circuit features became smaller, more complex and…”
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Integration of Planarized Internally-Shunted Submicron NbN Junctions by Villegier, J, Bouat, S, Aurino, M, Socquet-Clerc, C, Renaud, D

“…NbN-TaN-Nb(Ti)N non-hysteretic SNS Josephson junctions with Ta X N barriers tuned through nitrogen content at metal-insulator transition have been produced in…”
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Characterization of Field Penetration in Superconducting Multilayers Samples by Antoine, C Z, Berry, S, Aurino, M, Jacquot, J, Villegier, J, Lamura, G, Andreone, A

“…The best rf accelerating cavities are made of bulk niobium. This technology is now close to it full development, with any further improvement limited by the…”
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Cryogenic Test-Bed Applied to 9 K NbN RSFQ Devices Operation by Aurino, M, Baggetta, E, Bouat, S, Michal, V, Renaud, D, Bornier, C, Laine, M, Villegier, J

“…NbN RSFQ circuits operating at 9 K reduce the cooling constraints especially for portable, remote, telecoms or medical imaging applications. We have developed…”
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Epitaxial Growth of Sputtered Ultra-Thin NbN Layers and Junctions on Sapphire by Villegier, J.-C., Bouat, S., Cavalier, P., Setzu, R., Espiau de Lamaestre, R., Jorel, C., Odier, P., Guillet, B., Mechin, L., Chauvat, M.P., Ruterana, P.

“…High crystalline quality of ultra-thin NbN layers and of NbN-MgO-NbN tri-layers, epitaxially grown by DC-magnetron sputtering in the superconducting B1-cubic…”
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Superconducting single photon detectors made by local oxidation with an atomic force microscope by Delacour, C., Claudon, J., Poizat, J.-Ph, Pannetier, B., Bouchiat, V., Espiau de Lamaestre, R., Villegier, J.-C., Tarkhov, M., Korneev, A., Voronov, B., Gol'tsman, G.

“…The authors present a fabrication technique of superconducting single photon detectors made by local oxidation of niobium nitride ultrathin films. Narrow…”
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Characterization of superconducting nanometric multilayer samples for superconducting rf applications: First evidence of magnetic screening effect by Antoine, C. Z., Berry, S., Bouat, S., Jacquot, J-F., Villegier, J-C., Lamura, G., Gurevich, A

“…The best rf bulk niobium accelerating cavities have nearly reached their ultimate limits at rf equatorial magnetic field H≈200  mT close to the thermodynamic…”
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Current-Temperature Diagram of Resistive States in Long Superconducting YBa2Cu3O7 Strips by Harrabi, K., Ladan, F.-R., Lam, Vu Dinh, Maneval, J.-P., Hamet, J.-F., Villégier, J.-C., Bland, R. W.

“…Using a sequence of stepped bias currents in the nanosecond range, we have studied the destruction of superconductivity in c -axis textured YBa 2 Cu 3 O 7…”
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High critical current densities observed in PrBa2Cu3O7−δ∕YBa2Cu3O7−δ∕PrBa2Cu3O7−δ ultrathin film constrictions by Peroz, Ch, Villégier, J. C., Dégardin, A. F., Guillet, B., Kreisler, A. J.

“…An original process has been developed for fabricating 0.45×0.45μm2 constrictions with normal metal banks using stacked YBa2Cu3O7−δ and PrBa2Cu3O7−δ ultrathin…”
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Fabrication of a superconducting niobium nitride hot electron bolometer for single-photon counting by Romestain, R, Delaet, B, Renaud-Goud, P, Wang, I, Jorel, C, Villegier, J-C, Poizat, J-Ph

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Niobium and niobium nitride SQUIDs based on anodized nanobridges made with an atomic force microscope by Faucher, M., Fournier, T., Pannetier, B., Thirion, C., Wernsdorfer, W., Villegier, J.C., Bouchiat, V.

“…We present a fabrication method of superconducting quantum interference devices (SQUIDs) based on direct write lithography with an atomic force microscope…”
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Fabrication and Characterization of Ultrathin PBCO/YBCO/PBCO Constrictions for Hot Electron Bolometer THz Mixing Application by Peroz, C., Degardin, A.F., Villegier, J.-C., Kreisler, A.J.

“…Superconducting Hot Electron Bolometer (HEB) mixers are a competitive alternative to conventional mixer technologies in the terahertz range because of their…”
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Probing the Nonlinearities Arising in the Microwave Response of Superconductors by Intermodulation Distortion by Andreone, A., Cifariello, G., Di Gennaro, E., Lamura, G., Emery, N., Herold, C., Mareche, J.F., Lagrange, P., Orgiani, P., Xi, X.X., Villegier, J.C.

“…We present a systematic study of microwave nonlinearity, undertaken on different types of superconductors (Nb, NbN, MgB 2 , Y 1 Ba 2 Cu 3 O 7-delta ), in thin…”
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Tantalum STJ for photon counting detectors by Jorel, C., Feautrier, P., Villegier, J.-C.

“…Superconducting Tunnel Junctions (STJ's) are currently being developed as photon detectors for a wide range of applications. These detectors are used because…”
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New design and implementation of a fast modulator in NbN technology by Baggetta, E., Ebert, B., Hadacek, N., Villegier, J.-C., Maignan, M.

“…We have designed a band-pass sigma-delta modulator made in niobium nitride technology. The basic components of such a 10 GHz carrier frequency modulator are a…”
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Microstructure of NbN epitaxial ultrathin films grown on A -, M -,and R -plane sapphire by Espiau de Lamaëstre, R., Odier, Ph, Villégier, J.-C.

“…We compared ultrathin NbN films ( 2.5 - 10 nm ) simultaneously grown by dc reactive sputtering at 600 ° C on A , M , and R orientations of sapphire substrates…”
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Anomalous proximity effect in an inhomogeneous disordered superconductor by ESCOFFIER, W, CHAPELIER, C, HADACEK, N, VILLEGIER, J.-C

“…By combining very low temperature scanning tunneling microscopy and spectroscopy on a TiN film we have observed a nonuniform state comprising of…”
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Processing and characterization of high Jc NbN superconducting tunnel junctions for THz analog circuits and RSFQ by Larrey, V., Villegier, J.-C., Salez, M., Miletto-Granozio, F., Karpov, A.

“…A generic NbN Superconducting Tunnel Junctions (STJ) technology has been developed using conventional substrates (Si and SOI-SIMOX) for making THz…”
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Structure, electrical conductivity, critical superconducting temperature and mechanical properties of TiNxOy thin films by Goupy, J., Djemia, P., Pouget, S., Belliard, L., Abadias, G., Villégier, J.C., Sauvageot, J.L., Pigot, C.

“…For thermal applications, one needs to manufacture titanium nitride based films with as high as possible critical superconductivity temperature while…”
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