65 citations · 341 across the 26 of their papers we have counts for
12 papers · 1 filter
Persistence of characteristics of an ordered flux line lattice above the second peak in
A. Pautrat, C. Simon, Ch. Goupil +4
We report Small Angle Neutron Scattering measurements of the flux lines lattice (FLL) in . As previously reported, the scattered intensity decreases strongl…
New Insight into the Fluctuations of the Moving Vortex Lattice: Non-Gaussian Noise and Levy Flights
J. Scola, A. Pautrat, C. Goupil +3
We report measurements and analysis of the voltage noise due the to vortex motion, performed in superconducting Niobium micro-bridges. Noise in such small systems exhibits importan…
Why pinning by surface irregularities can explain the peak effect in transport properties and neutron diffraction results in NbSe2 and Bi-2212 crystals?
Charles Simon, Alain Pautrat, Christophe Goupil +6
The existence of a peak effect in transport properties (a maximum of the critical current as function of magnetic field) is a well-known but still intriguing feature of type II sup…
Experimental study of the correlation length of critical-current fluctuations in the presence of surface disorder: Probing vortex long-range interactions
J. Scola, A. Pautrat, C. Goupil +1
We report on critical currents and voltage noise measurements in Niobium strips in the superconducting state, in the presence of a bulk vortex lattice () and in the sur…
Longitudinal and transverse noise in a moving Vortex Lattice
J. Scola, A. Pautrat, C. Goupil +1
We have studied the longitudinal and the transverse velocity fluctuations of a moving vortex lattice (VL) driven by a transport current. They exhibit both the same broad spectrum a…
On voltage-current characteristics and critical current in Bi-2212
A. Pautrat, Ch. Simon, J. Scola +5
V(I) characteristics have been performed in a monocrystalline microbridge of . The vortex phase diagram has been greatly investigated. Linear but non-ohmic Voltage(Cur…
Metastable states of a flux line lattice studied by transport and Small Angle Neutron Scattering
A. Pautrat, J. Scola, Ch. Simon +5
Flux Lines Lattice (FLL) states have been studied using transport measurements and Small Angle Neutron Scattering in low T materials. In Pb-In, the bulk dislocations in the FLL…
The influence of twin boundaries on the Flux Line Lattice structure in YBaCuO: a study by Small Angle Neutron Scattering
Ch. Simon, A. Pautrat, G. Poulain +4
The influence of Twin Boundaries (TB) on the Flux Line Lattice(FLL) structure was investigated by Small Angle Neutron Scattering (SANS). YBaCuO single crystals possessing different…
Quantitative analysis of the critical current due to vortex pinning by surface corrugation
Alain Pautrat, J. Scola, C. Goupil +6
The transport critical current of a Niobium (Nb) thick film has been measured for a large range of magnetic field. Its value and variation are quantitatively described in the frame…
The vortex depinning transition in untwinned YBaCuO using complex impedance measurements
Alain Pautrat, Christophe Goupil, Charles Simon +3
We present surface impedance measurement of the vortex linear response in a large untwinned YBCO crystal. The depinning spectra obtained over a broad frequency range (100 Hz- 30 MH…
Electrodynamics of the vortex lattice in untwinned YBaCuO by complex impedance measurements
A. Pautrat, A. Daignere, C. Goupil +4
We report complex impedance measurements in an untwinned YBaCuO crystal. Our broad frequency range covers both the quasi static response and the resistive response of the vortex la…
Comment to the paper : Collapse of the vortex-lattice inductance and shear modulus at the melting transition in untwinned YBaCuO, by Matl \QTR{em}{et al.}
A. Pautrat, C. Goupil, Ch. Simon B. Plaçais +1
In a recent paper, Matl et al present a high-frequency study of the complex resistivity of a pinned vortex lattice in YBaCuO . They focus on the inductive-to-resistive transition w…