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Author Grigera, S.A.; Grigera, T.S.; Righi, E.F.; Nieva, G.; de la Cruz, F. openurl 
  Title Flux-cutting in YBa2Cu3O7-delta revisited Type Journal Article
  Year 2002 Publication PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS Abbreviated Journal  
  Volume 371 Issue 3 Pages (down) 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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  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 Osquiguil, E.; Frank, V.L.P.; de la Cruz, F. url  doi
openurl 
  Title Two dimensional collective flux pinning in melt spun superconducting amorphous Zr70Cu30 Type Journal Article
  Year 1985 Publication Solid State Communications Abbreviated Journal Solid State Commun.  
  Volume 55 Issue 3 Pages (down) 227-230  
  Keywords ZIRCONIUM COPPER ALLOYS – Amorphous; CRITICAL CURRENTS; PINNING FORCES; SUPERCONDUCTING MATERIALS  
  Abstract We have measured the critical currents in melt spun amorphous Zr70Cu30 and their evolution with heat treatment. We found that the pinning forces may be interpreted in terms of the Larkin-Ovchinnikov two dimensional collective pinning theory.  
  Address Centro Atómico Bariloche – Instituto Balseiro, Argentina  
  Corporate Author Thesis  
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  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 00381098 (ISSN) ISBN Medium  
  Area Expedition Conference  
  Notes Cited By (since 1996): 1; Export Date: 17 April 2009; Source: Scopus; CODEN: SSCOA; Language of Original Document: English; Correspondence Address: Osquiguil, E.J.; Centro At Approved no  
  Call Number BT @ osquigui @ Serial 420  
Permanent link to this record
 
 
Author López, D.; Jagla, E. A.; Righi, E. F.; Osquiguil, E.; Nieva, G.; Morré, E.; de la Cruz, F.; Balseiro, C. A. openurl 
  Title Dynamic softening of vortex lines in YBa2Cu3O7−δ single crystals Type Journal Article
  Year 1996 Publication Physica C: Superconductivity Abbreviated Journal Physica C  
  Volume 260 Issue 3-4 Pages (down) 211-216  
  Keywords  
  Abstract Transport measurements in the mixed state of oxygen-deficient YBa2Cu3O7−δ single crystals using the flux transformer configuration show that the flux liquid changes with increasing anisotropy from strongly correlated to uncorrelated in the field direction. For intermediate coupling, the current inducing loss of vortex correlation has a maximum near the irreversibility temperature. Thus, an effective softening of vortex lines with decreasing temperature is detected. We propose a simple model that accounts for this behavior by including the effects of the pinning potential on the dynamics of vortices.  
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  Notes Approved no  
  Call Number BT @ gnieva @ Serial 454  
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Author Righi, E. F.; Grigera, S. A.; Nieva, G.; de la Cruz, F. openurl 
  Title Vortex phase coherence along the c axis in YBa2Cu3O7-d Type Journal Article
  Year 1998 Publication Superconduvtivity Reviews Abbreviated Journal  
  Volume 2 Issue Pages (down) 205  
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  ISSN 1054-2698 ISBN Medium  
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  Notes Approved no  
  Call Number BT @ gnieva @ Serial 465  
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Author Ridner, A.; de la Cruz, F.; Martinez, E.N. url  doi
openurl 
  Title Surface superconductivity and Kapitza resistance Type Conference Article
  Year 1980 Publication Phonon Scattering in Condensed Matter Abbreviated Journal  
  Volume Issue Pages (down) 199-202  
  Keywords  
  Abstract It has been shown1 that surface superconductivity can be used as a localized thermomether to study the temperature close to an interface through which heat is being transported. Knowledge of the temperature profile in the interface region provides evidence which any theory of the heat transport mechanism must take into account. For interfaces between pure lead and HeII we have previously found1 clear differences between extrapolated surface temperatures Tk. and Tm, measured within some 1000Ã… of the interface using a superconducting thermometer. (The reader is refered to ref.1 for details on the experimental method).  
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  Publisher Plenum Publishing Corp. Place of Publication New York Editor Maris, H.J.  
  Language Summary Language Original Title Phonon Scattering in Condensed Matter  
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  ISSN ISBN Medium  
  Area Expedition Conference III International conference on Phonon Scattering in Condensed Matter  
  Notes Approved no  
  Call Number BT @ pedrazp @ Serial 555  
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Author Ferrari, H.; Valenzuela, S.O.; Bekeris, V.; Guimpel, J.; de la Cruz, F. openurl 
  Title Short-time magnetization in superconducting thin films Type Journal Article
  Year 1998 Publication REVISTA MEXICANA DE FISICA Abbreviated Journal  
  Volume 44 Issue Pages (down) 193-195  
  Keywords  
  Abstract We have investigated the magnetization in thin (Y;Gd)Ba2Cu3O7-delta superconducting films in the 100 μs time scale. Magnetic moment was measured with a non-conventional technique that combines the use of a pulsed magnetic field and a synchronized pulsed laser. Both virgin and magnetically cycled samples were examined and results are described within Bean's critical state model.  
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  ISSN 0035-001X ISBN Medium  
  Area Expedition Conference  
  Notes ISI:000077675900051 Approved no  
  Call Number BT @ hernan @ Serial 182  
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Author Civale, L.; Safar, H.; de la Cruz, F. url  doi
openurl 
  Title Percolation and glass behavior in ceramic superconductors: oxygen effects Type Journal Article
  Year 1989 Publication Modern Physics Letters B Abbreviated Journal Mod. Phys. Lett. B  
  Volume 3 Issue 2 Pages (down) 173-181  
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  Abstract It is shown that small variations of oxygen content in La1.8Sr0.2CuO4−δ can be used to control the reversible and irreversible magnetization temperature dependence of the superconducting state. A grain bond model is appropriate to describe the superconducting response of the ceramics. The study of the temperature dependence of the magnetization and the resistive transition temperature, in a slightly deoxygenated sample, show that the reversible superconducting state is strongly correlated to superconducting percolation. Deoxygenation has been shown to be an excellent technique to study the time evolution of metastable states induced by currents in the bonds and or in the grains. It is shown that superconducting grains are not correlated to ceramic grains.  
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  Notes Approved no  
  Call Number BT @ pedrazp @ Serial 802  
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Author Guimpel, J.; de la Cruz, M.E.; de la Cruz, F.; Fink, H.J.; Laborde, O.; Villegier, J.C. url  doi
openurl 
  Title Size dependence of the Superconducting critical temperature and fields of Nb/Al multilayers Type Journal Article
  Year 1986 Publication Journal of Low Temperature Physics Abbreviated Journal J. Low Temp. Phys.  
  Volume 63 Issue 1-2 Pages (down) 151-165  
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  Abstract The critical temperatureT cof Nb/Al multilayers decreases as the total sample thicknessd Tis decreased while the thickness of each Nb and Al layer is kept constant. To understand this behavior, models based on the proximity effect and on weak two-dimensional (2D) localization are employed. The latter uses a characteristic length, the thermal diffusion length, in relation tod Tto obtain 2D behavior and leads to a reasonable explanation ofT c(d T). It is also found that the slope atT c(d T) of the critical magnetic field perpendicular to the layers is independent ofd Twhen the Nb and Al layer thicknesses are kept constant. The angular dependence of the critical field is also measured.  
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  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0022-2291 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:A1986C112200008 Approved no  
  Call Number BT @ hernan @ Serial 193  
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Author Martinez, E.N.; Frank, V.L.P.; Osquiguil, E.J.; de la Cruz, F. url  doi
openurl 
  Title Dimensional crossovers in collective flux pinning Type Journal Article
  Year 1986 Publication Solid State Communications Abbreviated Journal Solid State Commun  
  Volume 60 Issue 2 Pages (down) 151-155  
  Keywords  
  Abstract The pinning force density in ribbons of melt spun (a) Zr70Cu30 is found to obey the Larkin-Ovchinnikov theory of collective pinning by dislocation loops, and shows two and three dimensional behaviour, besides an intermediate regime not contemplated by the theory. The dimensional crossovers allow determination of the radius of action of the pinning forces which is shown to be proportional to the coherence length. Its magnitude is too small, which points to quantitative shortcomings of the current theory.  
  Address Centro At  
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  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 00381098 (ISSN) ISBN Medium  
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  Notes Cited By (since 1996): 1; Export Date: 17 April 2009; Source: Scopus; CODEN: SSCOA; Language of Original Document: English; Correspondence Address: Martinez, E.N. Approved no  
  Call Number BT @ osquigui @ Serial 419  
Permanent link to this record
 
 
Author Esparza, D.A.; D'Ovidio, C.A.; Guimpel, J.; Osquiguil, E.; Civale, L.; de la Cruz, F. url  doi
openurl 
  Title The granular nature of bulk superconductivity at 40K in La1.8Sr0.2CuO4 Type Journal Article
  Year 1987 Publication Solid State Communications Abbreviated Journal Solid State Commun.  
  Volume 63 Issue 2 Pages (down) 137-140  
  Keywords CERAMIC MATERIALS; GRANULAR MATERIALS; LANTHANUM COMPOUNDS – Electric Conductivity; CRITICAL FIELDS; HIGH TEMPERATURE SUPERCONDUCTOR; MAGNETIC FLUX EXPULSION; TEMPERATURE DEPENDENCE; SUPERCONDUCTING MATERIALS  
  Abstract We have measured the electrical resistivity, magnetic flux expulsion and critical fields of the new high temperature superconductor La1.8Sr0.2CuO4 after different heat treatments. Our data show that the complete flux expulsion in these samples is consistent with the presence of shielding currents induced in multiple connected structures. The magnetization measurements indicate that the lowest field where flux penetrates into the sample should not be taken to be the bulk Hcl. It is shown that the absolute value of the electrical resistivity and its temperature dependence are not correlated with the superconducting critical field and temperature. We discuss the behaviour of the superconducting parameters and their relation with the electrical resistivity.  
  Address Basic Research Department, Centro At  
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  Language Summary Language Original Title  
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  Series Volume Series Issue Edition  
  ISSN 00381098 (ISSN) ISBN Medium  
  Area Expedition Conference  
  Notes Export Date: 17 April 2009; Source: Scopus; CODEN: SSCOA; Language of Original Document: English; Correspondence Address: Esparza, D.A.; Applied Research Department; Centro At Approved no  
  Call Number BT @ osquigui @ Serial 418  
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