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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 (up) 1998 Publication Solid State Communications Abbreviated Journal Solid State Commun.
Volume 107 Issue 7 Pages 335-339
Keywords
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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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 Righi, E. F.; Grigera, S. A.; Nieva, G.; de la Cruz, F.
Title Vortex phase coherence along the c axis in YBa2Cu3O7-d Type Journal Article
Year (up) 1998 Publication Superconduvtivity Reviews Abbreviated Journal
Volume 2 Issue Pages 205
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Series Editor Series Title Abbreviated Series Title
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ISSN 1054-2698 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number BT @ gnieva @ Serial 465
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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 (up) 1999 Publication PHYSICAL REVIEW B Abbreviated Journal
Volume 59 Issue 17 Pages 11201-11204
Keywords
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
Series Editor Series Title Abbreviated Series Title
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 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 (up) 2000 Publication PHYSICAL REVIEW B Abbreviated Journal
Volume 62 Issue 22 Pages 15183-15189
Keywords
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
Series Editor Series Title Abbreviated Series Title
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 (up) 2000 Publication PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS Abbreviated Journal
Volume 341 Issue Pages 1285-1286
Keywords
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 Correa, V.F.; Nieva, G.; de la Cruz, F.
Title Vortex softening: Origin of the second peak effect in Bi2Sr2CaCu2O8+delta Type Journal Article
Year (up) 2001 Publication PHYSICAL REVIEW LETTERS Abbreviated Journal
Volume 87 Issue 5 Pages 057003
Keywords
Abstract Magnetic hysteresis and transverse ac permeability measurements in Bi2Sr2CaCu2O8+delta allow a comparative analysis of the critical current with the elastic response of vortex structures, in equilibrium with their pinning potential, in the field and temperature region where the second peak is detected. This study provides strong evidence that the second peak has its origin in changes of the elastic equilibrium properties of the vortex structures.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0031-9007 ISBN Medium
Area Expedition Conference
Notes ISI:000170212200049 Approved no
Call Number BT @ hernan @ Serial 215
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Author Correa, V.F.; Herbsommer, J.A.; Kaul, E.E.; de la Cruz, F.; Nieva, G.
Title Order-disorder transition and the zero-dimensional vortex pinning regime in Bi2Sr2CaCu2O8+delta Type Journal Article
Year (up) 2001 Publication PHYSICAL REVIEW B Abbreviated Journal
Volume 63 Issue 9 Pages 092502
Keywords
Abstract We make a comparative study between the ab plane's dc critical current and the ac transverse magnetic permeability μ(perpendicular to) in the Campbell limit for optimally doped and overdoped Bi2Sr2CaCu2O8+delta samples. We focus attention on the low-temperature region [T/T-c(0) < 0.25], where the transition to the zero-dimensional Larkin limit is detected by the critical current as well as by a rapid change of the Labusch parameter with temperature. The order-disorder transition, characterized by the second peak in magnetization, disappears in the presence of this zero-dimensional pinning regime.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0163-1829 ISBN Medium
Area Expedition Conference
Notes ISI:000167312000016 Approved no
Call Number BT @ hernan @ Serial 218
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Author Grigera, S.A.; Grigera, T.S.; Righi, E.F.; Nieva, G.; de la Cruz, F.
Title Flux-cutting in YBa2Cu3O7-delta revisited Type Journal Article
Year (up) 2002 Publication PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS Abbreviated Journal
Volume 371 Issue 3 Pages 237-242
Keywords
Abstract In this paper we present an analysis of the response of the vortices in YBa2Cu3O7-delta to different configurations of applied driving forces. The use of inhomogeneous current allows us to induce vortex cutting. We determine the maximum current injected in different electrical contact distributions which preserves vortex integrity, and we show that vortex cutting cannot be explained by a single vortex picture. (C) 2001 Elsevier Science B.V. All rights reserved.
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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:000176131500007 Approved no
Call Number BT @ hernan @ Serial 212
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Author Maiorov, B.; Silhanek, A.V.; De la Cruz, F.; Osquiguil, E.
Title Comment on “strong vortex liquid correlation from multiterminal measurements on untwinned YBa2Cu3O7-? single crystals” Type Journal Article
Year (up) 2002 Publication Physical Review Letters Abbreviated Journal Phys Rev Lett
Volume 88 Issue 13 Pages 1397031
Keywords
Abstract Multiterminal measurements using experimental technique on twinned and untwinned YBa2Cu3O7-? crystals were presented. Inhomogeneous current distribution acting upon an uncorrelated vortex system showed that the dissipation of voltage at the top was larger than at the bottom. The behavior of the current voltage curves showed that the result Vtop = Vbot was a consequence of the limited voltage sensitivity.
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ISSN 00319007 (ISSN) ISBN Medium
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Notes Cited By (since 1996): 2; Export Date: 17 April 2009; Source: Scopus; CODEN: PRLTA; Language of Original Document: English; Correspondence Address: Maiorov, B.; Centro At Approved no
Call Number BT @ osquigui @ Serial 368
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Author Maiorov, B.; Silhanek, A.V.; De la Cruz, F.; Osquiguil, E.; Rydh, A.; Rapp,
Title Comment on “strong vortex liquid correlation from multiterminal measurements on untwinned YBa2Cu3O7-? single crystals” [2] (multiple letters) Type Journal Article
Year (up) 2002 Publication Physical Review Letters Abbreviated Journal Phys Rev Lett
Volume 88 Issue 13 Pages
Keywords Current voltage characteristics; Electric potential; Extrapolation; Magnetic fields; Melting; Twinning; Vortex flow; Yttrium barium copper oxides; Multiterminal measurements; Single crystals
Abstract
Address Centro At
Corporate Author Thesis
Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 00319007 (ISSN) ISBN Medium
Area Expedition Conference
Notes Export Date: 17 April 2009; Source: Scopus; CODEN: PRLTA; Language of Original Document: English; Correspondence Address: Maiorov, B.; Centro At Approved no
Call Number BT @ osquigui @ Serial 369
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