New Design and Implementation of a Fast Modulator in NbN Technology

Autor: M. Maignan, N. Hadacek, E. Baggetta, J.-C. Villegier, B. Ebert

Publikováno v: IEEE Transactions on Appiled Superconductivity. 15:453-456

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 band filtering resonator and an SFQ comparator synchronized with a clock frequency up to 20

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8c37f2e8182d8ea29cdd0eec9bd3b1a8
https://doi.org/10.1109/tasc.2005.849872

Pressure drop for a rarefied-gas flow through a tube with a thermal gradient at low temperature

Autor: J.P. Périn, F. Viargues, N. Hadacek

Publikováno v: Vacuum. 60:85-88

This paper presents calculations and experimental results obtained for a model pumping duct with a thermal gradient from room temperature to 80 or 15 K; the margin between numerical and experimental data is less than 10% at any flow regime. These res

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e0a91fbde0d441f9edf77206aef16509
https://doi.org/10.1016/s0042-207x(00)00358-4

Magnetic properties of HfO2 thin films

Autor: A. Nosov, N. Hadacek, Rose-Marie Galéra, Laurent Ranno, Pierre Strobel

Publikováno v: Journal of Physics: Condensed Matter
Journal of Physics: Condensed Matter, IOP Publishing, 2007, 19 (48), pp.486206. ⟨10.1088/0953-8984/19/48/486206⟩

We report on the magnetic and transport studies of hafnium oxide thin films grown by pulsed-laser deposition on sapphire substrates under different oxygen pressures, ranging from 10-7 to 10-1 mbar. Some physical properties of these thin films appear

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::41b1862e98d1c1505cc9b843064e2def
https://hal.archives-ouvertes.fr/hal-00197196

Double reentrant superconductor-insulator transition in thin TiN films

Autor: Marc Sanquer, N. Hadacek, J.-C. Villégier

Publikováno v: Physical Review B. 69

We studied the superconductor-insulator transition in very thin films of TiN (and NbN) at very low temperature $(T=35\mathrm{mK})$ as a function of sheet resistance and magnetic field. The critical temperature dependence versus sheet resistance follo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bba5057c7d1c9387967b6bd5f6500870
https://doi.org/10.1103/physrevb.69.024505

Granularity-induced gapless superconductivity in nbn films: Evidence of thermal phase fluctuations

Autor: Julien Bok, J.-Y. Laval, G. Lamura, Andrea Gauzzi, J. C. Villégier, N. Hadacek, J. Le Cochec, Bernard Plaçais

Publikováno v: Physical review. B, Condensed matter and materials physics 65 (2002): 104507. doi:10.1103/PhysRevB.65.104507
info:cnr-pdr/source/autori:Lamura G., Villigier J.-C., Gauzzi A., Le Cochec J., Laval J.Y., Placais B., Hadacek N., Bok J./titolo:Granularity-induced gapless superconductivity in nbn films: Evidence of thermal phase fluctuations/doi:10.1103%2FPhysRevB.65.104507/rivista:Physical review. B, Condensed matter and materials physics/anno:2002/pagina_da:104507/pagina_a:/intervallo_pagine:104507/volume:65

Using a single coil mutual inductance technique, we measure the low temperature dependence of the magnetic penetration depth in superconducting NbN films prepared with similar critical temperatures around 16 K but with different microstructures. Only

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c797e5bde853d955337c59af00b969a3
http://www.cnr.it/prodotto/i/32174