Non linear transport properties of an insulating YBCO nano-bridge (2009)
Fruchter, L., Kazumov, A., Briatico, J., Ivanov, A. A., Nicholaichik, V.
We have investigated the transport properties of an insulating sub-micrometric YBa2Cu3O7-d bridge, patterned on a thin film. As expected for a variable-range-hopping insulator, transport is found non...
Magnetoresistance and Hall effect in e-doped superconducting SrLaCuO thin films (2008)
Jovanovic, V., Li, Z. Z., Bouquet, F., Fruchter, L., Raffy, H.
We have epitaxially grown c-axis oriented SrxLa1-xCuO2 thin films by rf sputtering on KTaO3 substrates with x = 0.12. The as-grown deposits are insulating and a series of superconducting films with...
Fruchter, L., Li, Z. Z., Raffy, H.
The time-averaged and low--frequency noise transport properties were investigated in the vicinity of the superconductor--insulator transition for a Bi$_2$Sr$_{2-x}$La$_{x}$CuO$_{6+\delta}$ ($x=0.3$)...
Resistance noise in Bi_2Sr_2CaCu_2O$_{8+\delta}$ (2007)
Fruchter, L., Raffy, H., Li, Z. Z.
The resistance noise in a Bi_2Sr_2CaCu_2O$_{8+\delta}$ thin film is found to increase strongly in the underdoped regime. While the increase of the raw resistance noise with decreasing temperature...
Ordering in Heisenberg Spin Glasses (2007)
Petit, Dorothee, Fruchter, L., Campbell, I. A.
For five different Heisenberg spin glass systems, torque experiments were performed in applied magnetic fields up to $4 T$. The Dzyaloshinski-Moriya random anisotropy strengths, the in-field torque...
Influence of Disorder on the Hall Effect in Bi$_2$Sr$_2$CuO$_{6+\delta}$ (2006)
Fruchter, L., Raffy, H., Bouquet, F., Li, Z. Z.
The in-plane resistivity and Hall coefficient have been measured for the single-layer compound Bi$_2$Sr$_2$CuO$_{6+\delta}$ for the whole range of doping states. The deviation of the Hall...
Upper critical field from normal state fluctuations in Bi$_2$Sr$_2$CuO$_{6+\delta}$ (2005)
Bouquet, F., Fruchter, L., Sfar, I., Li, Z. Z., Raffy, H.
The in-plane magnetoresistance of an epitaxial Bi$_2$Sr$_2$CuO$_{6+\delta}$ thin film was systematically investigated as a function of doping, above $T_c$. The orbital magnetoconductance is used to...
Current dependent fluctuations in a Bi$_2$Sr$_2$CuO$_{6+\delta}$ thin film (2005)
Sfar, I., Li, Z. Z., Bouquet, F., Raffy, H., Fruchter, L.
The current dependence of the excess conductivity is measured up to $\simeq 3 T_c$ for a Bi$_2$Sr$_2$CuO$_{6+\delta}$ thin film, as a function of doping. It is found to be anomalously sensitive to...
Fruchter, L., Sfar, I., Bouquet, F., Li, Z. Z., Raffy, H.
The suppression of excess conductivity with electric field is studied for Bi$_2$Sr$_2$Ca$_{n-1}$Cu$_n$O$_{2n+4+x}$ ($n$ = 1, 2) thin films. A pulse-probe technique is used, which allows for an...
Continuous melting of a driven two-dimensional flux lattice with strong pins (2003)
The phase diagram of a driven two-dimensional vortex lattice in the presence of dense quasi-point pins is investigated. The transition from the crystal to the liquid is found continuous at...
Ordering in Heisenberg Spin Glasses (2001)
Petit, Dorothee, Fruchter, L., Campbell, I. A.
For five different Heisenberg spin glass systems, torque experiments were performed in applied magnetic fields up to $4 T$. The Dzyaloshinski-Moriya random anisotropy strengths, the in-field torque...
The dynamic transition between the ordered flow and the plastic flow is studied for a two-dimensional driven vortex lattice, in the presence of sharp and dense pinning centers, from numerical...
Metastable states of a driven flux lattice in a superconductor with strong pins (2001)
The flux lattice driven by a uniform driving force in a superconductor with hot, strong, sharp and randomly distributed pinning centers, with applied magnetic field half the matching field is...
Fluid and plastic flow dynamics of the critical state for a strongly pinned 2D superconductor (2000)
We present simulations of the dynamic critical state for a 2D superconductor with strong pinning centers, corresponding to a matching field twice the applied magnetic field. The sharp crossover...
Ordering in a spin glass under applied magnetic field (1999)
Petit, D., Fruchter, L., Campbell, I. A.
Torque, torque relaxation, and magnetization measurements on a AuFe spin glass sample are reported. The experiments carried out up to 7 T show a transverse irreversibility line in the (H,T) plane up...
Hayani, B., Johnson, S. T., Fruchter, L., Van Der Beek, C. J.
We have measured an angle-dependent contribution to the equilibrium magnetization of a YBa_2Cu_3O_{7-d} single crystal with columnar defects created by 5.8GeV Pb ions. This contribution manifests...
AGING EFFECTS ON THE RELAXATION OF TORQUE AND MAGNETIZATION IN A CANONICAL SPIN GLASS (1988)
Giovannella, C., Fruchter, L., Campbell, I.
Using a capacity cell torquemeter we have investigated the aging effects on the form of the torque relaxation in a CuMn 5 % spin glass. The data show that in moderate fields the spin glass evolves...
ON THE FIELD COOLED SUSCEPTIBILITY OF SUPERCONDUCTING YBaCuO SAMPLES (1988)
Celani, F., Messi, R., Sparvieri, N., Pace, S., Saggese, A., Giovannella, C., ...
Using a SQUID magnetometer, we have studied the magnetization of different samples of high Tc sintered superconductors in field cooled (FC) conditions. Depending on the sample, very different trends...
YBa2Cu3O7-δ SINGLE CRYSTALS INVESTIGATED BY TORQUE AND MAGNETOMETRY (1988)
Fruchter, L., Giovannella, C., Ousséna, M., Senoussi, S., Campbell, I.
Magnetic critical current densities of an YBaCuO single crystal have been investigated using both magnetometry and torque. For currents along the C axis, JC is estimated to be 103 and 105 A/cm2...
AGING EFFECTS ON THE RELAXATION OF TORQUE AND MAGNETIZATION IN A CANONICAL SPIN GLASS (1988)
Giovannella, C., Fruchter, L., Campbell, I.
Using a capacity cell torquemeter we have investigated the aging effects on the form of the torque relaxation in a CuMn 5 % spin glass. The data show that in moderate fields the spin glass evolves...
ON THE FIELD COOLED SUSCEPTIBILITY OF SUPERCONDUCTING YBaCuO SAMPLES (1988)
Celani, F., Messi, R., Sparvieri, N., Pace, S., Saggese, A., Giovannella, C., ...
Using a SQUID magnetometer, we have studied the magnetization of different samples of high Tc sintered superconductors in field cooled (FC) conditions. Depending on the sample, very different trends...
YBa2Cu3O7-δ SINGLE CRYSTALS INVESTIGATED BY TORQUE AND MAGNETOMETRY (1988)
Fruchter, L., Giovannella, C., Ousséna, M., Senoussi, S., Campbell, I.
Magnetic critical current densities of an YBaCuO single crystal have been investigated using both magnetometry and torque. For currents along the C axis, JC is estimated to be 103 and 105 A/cm2...
AGING EFFECTS ON THE RELAXATION OF TORQUE AND MAGNETIZATION IN A CANONICAL SPIN GLASS (1988)
Giovannella, C., Fruchter, L., Campbell, I.
Using a capacity cell torquemeter we have investigated the aging effects on the form of the torque relaxation in a CuMn 5 % spin glass. The data show that in moderate fields the spin glass evolves...
ON THE FIELD COOLED SUSCEPTIBILITY OF SUPERCONDUCTING YBaCuO SAMPLES (1988)
Celani, F., Messi, R., Sparvieri, N., Pace, S., Saggese, A., Giovannella, C., ...
Using a SQUID magnetometer, we have studied the magnetization of different samples of high Tc sintered superconductors in field cooled (FC) conditions. Depending on the sample, very different trends...
YBa2Cu3O7-δ SINGLE CRYSTALS INVESTIGATED BY TORQUE AND MAGNETOMETRY (1988)
Fruchter, L., Giovannella, C., Ousséna, M., Senoussi, S., Campbell, I.
Magnetic critical current densities of an YBaCuO single crystal have been investigated using both magnetometry and torque. For currents along the C axis, JC is estimated to be 103 and 105 A/cm2...
Youngblood, K, Fruchter, L, Ding, G, Lopez, J, Bonagura, V, Davidson, A
We report the DNA sequences of the heavy and light chain immunoglobulin genes of 11 monoclonal rheumatoid factor (RF)-secreting lines derived from the peripheral blood of two patients with rheumatoid...
Youngblood, K, Fruchter, L, Ding, G, Lopez, J, Bonagura, V, Davidson, A
We report the DNA sequences of the heavy and light chain immunoglobulin genes of 11 monoclonal rheumatoid factor (RF)-secreting lines derived from the peripheral blood of two patients with rheumatoid...