Zobrazeno 1 - 10
of 68
pro vyhledávání: '"F. R. Ladan"'
Publikováno v:
Journal of Superconductivity and Novel Magnetism. 34:2531-2535
We have studied the characteristics of different metastable states in NbTi thin film deposited on sapphire substrate in a region very close to the transition temperature T $$_{c}$$ , which was estimated to be about 7.6 K in our sample. Localized diss
Autor:
J.-C. Villégier, R.W. Bland, Vu Dinh Lam, Khalil Harrabi, F. R. Ladan, J.-P. Maneval, J.-F. Hamet
Publikováno v:
Journal of Low Temperature Physics. 157:36-56
Using a sequence of stepped bias currents in the nanosecond range, we have studied the destruction of superconductivity in c-axis textured YBa2Cu3O7 strips of various thickness and structure (single or multi-layers). Sufficiently far from Tc, vortex
Publikováno v:
Journal of Low Temperature Physics
Journal of Low Temperature Physics, Springer Verlag (Germany), 2008, 153, pp.103-122. ⟨10.1007/s10909-008-9821-7⟩
Journal of Low Temperature Physics, 2008, 153, pp.103-122. ⟨10.1007/s10909-008-9821-7⟩
Journal of Low Temperature Physics, Springer Verlag (Germany), 2008, 153, pp.103-122. ⟨10.1007/s10909-008-9821-7⟩
Journal of Low Temperature Physics, 2008, 153, pp.103-122. ⟨10.1007/s10909-008-9821-7⟩
International audience; By applying nanosecond current pulses to narrow superconducting Nb strips, we have observed the induced resistive states expected for quasi 1-D transport, namely localized phase-slip centres (PSC) and hot spots (HS). The curre
Publikováno v:
Journal of the Korean Physical Society. 52:1641-1644
The resistance induced by nanosecond pulses of electric currrent or of light has been studied in superconducting Nb and NbN thin films. Narrow bridges exhibit the features expected from quasi-1D transport, namely, localized phase-slip centers (PSC) a
Publikováno v:
Journal of Superconductivity: Incorporating Novel Magnetism. 14:347-354
In order to study dynamically the resistive states which appear as jumps in the I–V curves of narrow bridges, we have submitted YBaCuO and Nb films to nanosecond current steps and laser pulses simultaneously. In constant current feed, the distincti
Publikováno v:
Journal of Superconductivity: Incorporating Novel Magnetism. 14:325-329
In addition to the critical current Ic (T), which generates Phase-Slip Centers (PSCs), thin superconducting films possess a well-defined second limiting current Ih, or current intensity able to maintain a preestablished hot spot. By pulsing step func
Publikováno v:
Superconductor Science and Technology. 13:1222-1226
In narrow YBa2Cu3O7 films, we have measured the delay time between the excitation by a critical current pulse and the voltage response, and analysed it on the basis of a time-dependent Ginzburg-Landau equation to provide the gap relaxation time. In t
Autor:
A. Marie-De-Ficquelmont, Marco Aprili, Jerome Lesueur, J. P. Maneval, J.-C. Villegier, L. Mechin, F.-R. Ladan, F. Chibane, F. S. Jelila
Publikováno v:
Physical Review Letters. 81:1933-1936
Narrow ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7}$ films, excited by pulses of supercritical current, had their nanosecond electric response monitored in zero applied magnetic field. Delayed voltage steps plus constant differential resistan
Autor:
R. Barchewitz, F. R. Ladan, G. Soullié, Bernard Vidal, P. Troussel, M. Idir, Alessandro Mirone, P. Guerin, S. Bac
Publikováno v:
Optics Communications. 144:281-291
An experimental study of the diffraction of X rays in the keV region by a lamellar multilayer amplitude grating is described. This optics is obtained by periodic etching of an interferential multilayer mirror down to the substrate. The advantages pro
Publikováno v:
IEEE Transactions on Appiled Superconductivity. 7:3200-3203
We have completed a comparative study on YBaCuO/PrBaCuO/YBaCuO trilayer junctions according to the crystallographic orientation of the films used in order to determine the best orientation to get a Josephson junction working at 77 K. To this end, 100