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Author (up) Grigera, S.A.; Morre, E.; Osquiguil, E.; Nieva, G.; de la Cruz, F. openurl 
  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  
  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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  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 (up) 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 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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  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  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 (up) 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 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 (up) Morré, E.; Grigera, S.; Osquiguil, E.; Nieva, G.; de la Cruz, F. url  doi
openurl 
  Title Angular restrictions on the glass transition and on the c-axis correlated liquid phase in twinned YBa2Cu3O7-? Type Journal Article
  Year 1997 Publication Physics Letters A Abbreviated Journal Phys. Lett. A  
  Volume 233 Issue 1-2 Pages 130-134  
  Keywords  
  Abstract We have measured the angular dependence of the vortex velocity correlation temperature Tth(H) in twinned YBa2Cu3O7-? single crystals. The data show that the c-axis correlated vortex liquid phase exists up to angles much larger than expected within a single vortex pinning picture. Despite this, the second-order solid-liquid glass transition is shown to be restricted only to external magnetic fields applied within a few degrees from the c-axis direction.  
  Address Centro Atómico Bariloche  
  Corporate Author Thesis  
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  ISSN 03759601 ISBN Medium  
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  Notes Cited By (since 1996): 13; Export Date: 17 April 2009; Source: Scopus; CODEN: PYLAA; Language of Original Document: English; Correspondence Address: Morr Approved no  
  Call Number BT @ osquigui @ Serial 381  
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