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Author Martinez, E.N.; Frank, V.L.P.; Osquiguil, E.J.; de la Cruz, F. url  doi
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  Title Dimensional crossovers in collective flux pinning Type Journal Article
  Year 1986 Publication Solid State Communications Abbreviated Journal (up) Solid State Commun  
  Volume 60 Issue 2 Pages 151-155  
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  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.  
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  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  
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Author Luzuriaga, J.; de la Cruz, F. doi  openurl
  Title Reversible magnetization of surface superconductivity Type Journal Article
  Year 1978 Publication Solid State Communications Abbreviated Journal (up) Solid State Commun  
  Volume 25 Issue 8 Pages 605-607  
  Keywords MAGNETIZATION; SUPERCONDUCTING MATERIALS  
  Abstract Direct measurements of the surface superconducting magnetization of the PbTl system shows that this state is a thermodynamic reversible one.  
  Address Centro Atómico Bariloche  
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  ISSN 00381098 (ISSN) ISBN Medium  
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  Notes Approved no  
  Call Number BT @ luzuriag @ Serial 505  
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Author Fasano, Y.; de Seta, M.; Menghini, M.; Pastoriza, H.; de la Cruz, F. doi  openurl
  Title Imaging the structure of the interface between symmetries interconnected by a discontinuous transition Type Journal Article
  Year 2003 Publication Solid State Communications Abbreviated Journal (up) Solid State Commun.  
  Volume 128 Issue 3-4 Pages 51-55  
  Keywords  
  Abstract We have been able to observe with single particle resolution the interface between two structural symmetries that cannot be interconnected by a continuous transition. By means of an engineered 2D potential that pins the extremity of vortex strings a square symmetry was imposed at the surface of a 3D vortex solid. Using the Bitter decoration technique and on account of the continuous vortex symmetry, we visualize how the induced structure transforms along the vortex direction before changing into the expected hexagonal structure at a finite distance from the surface.  
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  Call Number BT @ hernan @ fasano03a Serial 18  
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Author Grigera, S.A.; Morré, E.; Osquiguil, E.; Nieva, G.; De la Cruz, F. doi  openurl
  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 (up) 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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  ISSN 0038-1098 ISBN Medium  
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  Notes ISI:000074907100004 Approved no  
  Call Number BT @ hernan @ Serial 237  
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Author de la Cruz, M.E.; Godfrin, E.J.P.; de la Cruz, F.; de Allende, C. url  doi
openurl 
  Title Superconducting intermediate state in cadmium Type Journal Article
  Year 1976 Publication Solid State Communications Abbreviated Journal (up) Solid State Commun.  
  Volume 18 Issue 6 Pages 747-749  
  Keywords  
  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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  Call Number BT @ pedrazp @ Serial 528  
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Author Esquinazi, P.; de la Cruz, M.E.; Ridner, A.; de la Cruz, F. url  doi
openurl 
  Title Heat treatment effects in amorphous metals: Zr70Cu30 and La70Cu30 Type Journal Article
  Year 1982 Publication Solid State Communications Abbreviated Journal (up) 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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  Notes Approved no  
  Call Number BT @ pedrazp @ Serial 529  
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Author Kaufman, H.L.; de la Cruz, F. url  doi
openurl 
  Title Fluctuation induced diamagnetism in aluminum Type Journal Article
  Year 1971 Publication Solid State Communications Abbreviated Journal (up) 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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  Call Number BT @ pedrazp @ Serial 803  
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Author Arce, R.; de la Cruz, F.; Guimpel, J. url  doi
openurl 
  Title Superconducting behavior of amorphous Zr70Cu30 Type Journal Article
  Year 1983 Publication Solid State Communications Abbreviated Journal (up) Solid State Commun.  
  Volume 47 Issue 11 Pages 885-887  
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  Abstract Measurement of the Meissner penetration depth, λ(T) were made in amorphous Zr70Cu30 samples. The results indicate that this amorphous alloy behaves as a BCS superconductor with 2Δ(0)+45 degree rulekTc = 3.8, where Δ(0) is the superconducting energy gap at T=0 and Tc the critical temperature. It is also concluded that the low energy excitation, TLS, characteristics of amorphous material does not contribute to Tc.  
  Address Centro Atómico Bariloche – Instituto Balseiro  
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  ISSN 0038-1098 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number BT @ pedrazp @ Serial 532  
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Author Decca, R.; Osquiguil, E.; de la Cruz, F.; D'Ovidio, C.; Malachevski, M.T.; Esparza, D. url  doi
openurl 
  Title Non linear temperature dependence of the resistivity of LaSrCuO: Effects of Sr content Type Journal Article
  Year 1989 Publication Solid State Communications Abbreviated Journal (up) Solid State Commun.  
  Volume 69 Issue 4 Pages 355-357  
  Keywords Ceramic Materials; Lanthanum Compounds--Electric Conductivity; Superconductivity; Ceramic Superconductors; Superconducting Materials  
  Abstract The linear temperature dependence of the electrical resistivity has been taken to be one of the characteristic features of the ceramic superconductors. Measurements of the electrical resistance of the LaSrCuO system in a wide temperature range show that the previous statement is only an approximation valid for some values of the Sr concentration.  
  Address Applied Research Department, Centro At'omico Bariloche  
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  Notes Cited By (since 1996): 2; Export Date: 17 April 2009; Source: Scopus; CODEN: SSCOA; Language of Original Document: English; Correspondence Address: Decca, R.; Basic Research Department; Centro At Approved no  
  Call Number BT @ osquigui @ Serial 414  
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Author Osquiguil, E.; Decca, R.; Nieva, G.; Civale, L.; de la Cruz, F. url  doi
openurl 
  Title La1.80 Sr0.20 CuO4-delta a clean limit superconductor Type Journal Article
  Year 1988 Publication Solid State Communications Abbreviated Journal (up) Solid State Commun.  
  Volume 65 Issue 6 Pages 491-494  
  Keywords CERAMIC MATERIALS; LANTHANUM COMPOUNDS – Electric Conductivity; CERAMIC SUPERCONDUCTORS; CLEAN LIMIT SUPERCONDUCTOR; HIGH-TEMPERATURE SUPERCONDUCTORS; OXYGEN CONCENTRATION; SUPERCONDUCTING MATERIALS  
  Abstract The electrical resistivity of the superconductor La1.80Sr0.20Cu04-? has been measured in a wide range of temperatures as a function of oxygen and vacuum heat treatments. The resistivity changes reversibly orders of magnitude with oxygen concentration. There is no sign of saturation at high temperatures, even for samples where the resistivity is increased by heat treatment in vacuum. Using the experimental data and general arguments it is concluded that the ceramic superconductors are high ? materials in the clean limit.  
  Address Instituto Balseiro 8400 Bariloche, R.N., Argentina# # Comisi  
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  ISSN 00381098 (ISSN) ISBN Medium  
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  Notes Export Date: 17 April 2009; Source: Scopus; CODEN: SSCOA; Language of Original Document: English; Correspondence Address: Osquiguil, E. Approved no  
  Call Number BT @ osquigui @ Serial 416  
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