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| Author | Fasano, Y.; Menghini, M.; de la Cruz, F.; Nieva, G. | ||||
| Title | Weak interaction and matching conditions for replicas of vortex lattices | Type  |
Journal Article | ||
| Year | 2000 | Publication | PHYSICAL REVIEW B | Abbreviated Journal | |
| Volume | 62 | Issue | 22 | Pages | 15183-15189 |
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| Abstract | We present experiments demonstrating the conditions under which weak interaction between replicas of vortex structures break their translational and rotational symmetry. The Fe clumps introduced by Bitter decorations of vortex structures are used to induce an extremely weak interaction fur subsequent vortex structures in low and high temperature superconducting crystals. The matching between the Fe pattern acid the vortex configuration require the structure to be prepared under quite stringent conditions: The field creating the structure has to be the same in magnitude although it can differ in orientation from that used for the preparation of the Fe pattern. The interaction between vortex replicas as represented by the Fe clumps of Bitter decorations makes it possible to differentiate the vortex nucleation and propagation mechanisms in low and high temperature superconductors. | ||||
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| Language | Summary Language | Original Title | |||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0163-1829 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | ISI:000165883800075 | Approved | no | ||
| Call Number | BT @ hernan @ | Serial | 219 | ||
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| Author | Correa, V.F.; Herbsommer, J.A.; Kaul, E.E.; de la Cruz, F.; Nieva, G. | ||||
| Title | Onset of the 0-dimensional vortex pinning behavior in the optimally doped and overdoped Bi2Sr2CaCu2O8+delta system | Type |
Journal Article | ||
| Year | 2000 | Publication | PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | Abbreviated Journal | |
| Volume | 341 | Issue | Pages | 1285-1286 | |
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| Abstract | We report results of transverse AC magnetic permeability in the linear regime and DC magnetization loops for optimally doped and oxygen overdoped samples of Bi2Sr2CaCu2O8+delta The data cover the low temperature (T < 25K) and low held (H-a < 1000 Oe) region of the magnetic (H-a-T) phase diagram. In optimally doped as well as in overdoped samples a crossover to a O-dimensional pinning regime (Larkin length, L-C(C), shorter than the inter-plane CuO2 distance) is observed at a characteristic temperature Too for all investigated fields. The order-disorder transition, identified by the second peak in magnetization and a non monotonous field dependence of the AC penetration depth, is quenched below T-0D. | ||||
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| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0921-4534 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | ISI:000165855700242 | Approved | no | ||
| Call Number | BT @ hernan @ | Serial | 221 | ||
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| Author | Grigera, S.A.; Morre, E.; Osquiguil, E.; Nieva, G.; de la Cruz, F. | ||||
| Title | Two-step liquid-solid vortex transition with the field along the ab planes in YBa2Cu3O7-delta crystals | Type |
Journal Article | ||
| Year | 1999 | Publication | PHYSICAL REVIEW B | Abbreviated Journal | |
| Volume | 59 | Issue | 17 | Pages | 11201-11204 |
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| Abstract | Resistivity measurements for different Lorentz force configurations and the detection of the longitudinal vortex velocity correlation length, with the magnetic field applied parallel to the ab planes, in the mixed state of clean and twinned YBa2Cu3O7-delta single crystals,' support the existence of a vortex-smectic phase when the vortices interact with an attractive periodic potential. The transition from the vortex-liquid to the vortex-solid state is shown to be achieved in two steps, a continuous transition from a liquid to a possible smectic phase and another continuous one from the smectic phase to a solid. [S0163-1829(99)09413-8]. | ||||
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| Language | Summary Language | Original Title | |||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0163-1829 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | ISI:000084631900027 | Approved | no | ||
| Call Number | BT @ hernan @ | Serial | 231 | ||
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| Author | Grigera, S.A.; Morre, E.; Osquiguil, E.; Balseiro, C.; Nieva, G.; de la Cruz, F. | ||||
| Title | Bose-glass phase in twinned YBa2Cu3O7-delta | Type |
Journal Article | ||
| Year | 1998 | Publication | PHYSICAL REVIEW LETTERS | Abbreviated Journal | |
| Volume | 81 | Issue | 11 | Pages | 2348-2351 |
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| Abstract | Using an extensive scaling analysis of the transport properties in twinned YBa2Cu3O7-delta crystals we have experimentally found the predicted change in the universality class of the Bose-glass to liquid transition when the magnetic field is applied at small angles away from the direction of the correlated defects. The new dynamical critical exponent is s' = 1.1 +/- 0.3. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0031-9007 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | ISI:000075897300042 | Approved | no | ||
| Call Number | BT @ hernan @ | Serial | 235 | ||
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| Author | Grigera, S.A.; Morré, E.; Osquiguil, E.; Nieva, G.; De la Cruz, F. | ||||
| Title | Nonlocal transport properties and size effects in heavily twinned YBa2Cu3O7-delta single crystals | Type |
Journal Article | ||
| Year | 1998 | Publication | Solid State Communications | Abbreviated Journal | Solid State Commun. |
| Volume | 107 | Issue | 7 | Pages | 335-339 |
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| Abstract | We demonstrate experimentally that when the vortex correlation length in the liquid state becomes of the order of the sample thickness, size effects dominate the transport properties of the macroscopic vortex structures, implying a nonlocal response in the transformer experiments. | ||||
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| Language | Summary Language | Original Title | |||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0038-1098 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | ISI:000074907100004 | Approved | no | ||
| Call Number | BT @ hernan @ | Serial | 237 | ||
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| Author | Rodríguez, E.; Duran, C.; Luzuriaga, J.; de la Cruz, F.; Fainstein, C. | ||||
| Title | Anomalous behaviour of the vortex structure in Bi4Ca2Sr4Cu4O16+y measured with a vibrating reed at low magnetic fields | Type |
Journal Article | ||
| Year | 1990 | Publication | Physica C: Superconductivity | Abbreviated Journal | Physica C |
| Volume | 165 | Issue | 3-4 | Pages | 315-320 |
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| Abstract | The response of the vortex structure in ceramic samples of Bi4Ca2Sr4Cu4O16+y has been measured by means of a vibrating reed technique in magnetic fields below 0.2 T. An anomally in the response of the reed is seen at temperatures of around 30 to 40 K, well below the critical temperature, indicating a transition similar to that attributed to a melting of the Flux Line Lattice. There is a shift in the temperature at which the anomaly is detected when one increases the driving force on the reed, while the dissipation shows a maximum associated to the transition which scales with the square of the applied magnetic field. Comparison with magnetization measurements shows that there is non-zero critical current at the same temperature where the anomalous behaviour is detected with our technique. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0921-4534 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | ISI:A1990CN49800014 | Approved | no | ||
| Call Number | BT @ hernan @ | Serial | 261 | ||
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| Author | de la Cruz, M.E.; Godfrin, E.J.P.; de la Cruz, F.; de Allende, C. | ||||
| Title | Superconducting intermediate state in cadmium | Type |
Journal Article | ||
| Year | 1976 | Publication | Solid State Communications | Abbreviated Journal | Solid State Commun. |
| Volume | 18 | Issue | 6 | Pages | 747-749 |
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| Abstract | Perpendicular magnetic critical fields for cadmium foils were measured to thicknesses below the temperature dependent coherence length. The presence of supercooling indicates first-order thermodynamic transitions for all samples. A modification of Davies' model leads to a good fit of the experimental data. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0038-1098 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | BT @ pedrazp @ | Serial | 528 | ||
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| Author | Esquinazi, P.; de la Cruz, M.E.; Ridner, A.; de la Cruz, F. | ||||
| Title | Heat treatment effects in amorphous metals: Zr70Cu30 and La70Cu30 | Type |
Journal Article | ||
| Year | 1982 | Publication | Solid State Communications | Abbreviated Journal | Solid State Commun. |
| Volume | 44 | Issue | 6 | Pages | 941-944 |
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| Abstract | We measured the electrical resistivity (4–300 K), superconducting critical temperature and thermal conductivity (0.5–7 K) of the amorphous metals Zr70Cu30 and La70Cu30. Heat treatments below crystallization temperature induced changes in these properties. In particular, in the first stage of the annealing of Zr70Cu30 there are systematic changes in the thermal conductivity and the critical temperature, while the electrical resistivity remains constant. We show that there is no simple correlation between the thermal conductivity processes in the low temperature and plateau regions. We also show that the thermal conductivity of as quenched La70Cu30 is typical of amorphous metals, contrary to information previously reported. | ||||
| Address | Centro Atómico Bariloche – Instituto Balseiro | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0038-1098 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | BT @ pedrazp @ | Serial | 529 | ||
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| Author | Esquinazi, P.; de la Cruz, M.E.; de la Cruz, F. | ||||
| Title | Heat treatment effects in La70Cu30 amorphous system | Type |
Journal Article | ||
| Year | 1981 | Publication | Physica B+C | Abbreviated Journal | |
| Volume | 108B | Issue | 1-3 | Pages | 1215-1216 |
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| Abstract | It is shown that superconductivity is a useful tool to investigate the evolution of the amorphous state, when heat treatment below the crystallization temperature. | ||||
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| Language | Summary Language | Original Title | |||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0378-4363 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | BT @ pedrazp @ | Serial | 530 | ||
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| Author | Kaufman, H.L.; de la Cruz, F. | ||||
| Title | Fluctuation induced diamagnetism in aluminum | Type |
Journal Article | ||
| Year | 1971 | Publication | Solid State Communications | Abbreviated Journal | Solid State Commun. |
| Volume | 9 | Issue | 20 | Pages | 1729-1732 |
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| Abstract | The magnetic field and temperature dependence of the magnetization of bulk aluminum near the normal-superconductor transition has been measured. Due to the large amount of supercooling in one of the samples it was possible to extend the measurements well below the critical temperature. A comparison of the experimental results with theory is presented. Résumé Nous avons mesuré la dépendance en champ magnétique et en température de la magnétisation d'un échantillon massif d'aluminium au voisinage de la transition état normal-état supraconducteur. Grâce au ‘supercooling’ important d'un des échantillon, nous avons pu étendre nos mesures bien au dessous de la température critique. Nous comparons les résultats expérimentaux à la théorie. |
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0038-1098 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | BT @ pedrazp @ | Serial | 803 | ||
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