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Author (up) Maiorov, B.; Silhanek, A.V.; De la Cruz, F.; Osquiguil, E. url  openurl
  Title Comment on “strong vortex liquid correlation from multiterminal measurements on untwinned YBa2Cu3O7-? single crystals” Type Journal Article
  Year 2002 Publication Physical Review Letters Abbreviated Journal Phys Rev Lett  
  Volume 88 Issue 13 Pages 1397031  
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  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 (up) Maiorov, B.; Silhanek, A.V.; De la Cruz, F.; Osquiguil, E.; Rydh, A.; Rapp, url  openurl
  Title Comment on “strong vortex liquid correlation from multiterminal measurements on untwinned YBa2Cu3O7-? single crystals” [2] (multiple letters) Type Journal Article
  Year 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  
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  ISSN 00319007 (ISSN) ISBN Medium  
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  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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Author (up) Niebieskikwiat, D.; Silhanek, A.; Civale, L.; Nieva, G.; Levy, P.; Krusin-Elbaum, L. openurl 
  Title Suppression of matching field effects by splay and pinning energy dispersion in YBa2Cu3O7 with columnar defects Type Journal Article
  Year 2001 Publication PHYSICAL REVIEW B Abbreviated Journal  
  Volume 63 Issue 14 Pages 144504  
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  Abstract We report measurements of the irreversible magnetization M-i of a large number of YBa2Cu3O7 single crystals with columnar defects (CD). Some of them exhibit a maximum in M-i when the density of vortices equals the density of tracks, at temperatures above 40 K. We show that the observation of these matching field effects is constrained to those crystals where the orientational and pinning energy dispersion of the CD system lies below a certain threshold. The amount of such dispersion is determined by the mass and energy of the irradiation ions, and by the crystal thickness. Time relaxation measurements show that the matching effects are associated with a reduction of the creep rate, and occur deep into the collective pinning regime.  
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  ISSN 0163-1829 ISBN Medium  
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  Notes ISI:000168059800084 Approved no  
  Call Number BT @ hernan @ Serial 217  
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Author (up) Silhanek, A.; Civale, L.; Candia, S.; Nieva, G.; Pasquini, G.; Lanza, H. openurl 
  Title Evidence for vortex staircases in the whole angular range due to competing correlated pinning mechanisms Type Journal Article
  Year 1999 Publication PHYSICAL REVIEW B Abbreviated Journal  
  Volume 59 Issue 21 Pages 13620-13623  
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  Abstract We present measurements of the angular dependence of the irreversible magnetization of YBa2Cu3O7 single crystals with columnar defects inclined with respect to the c axis. At high fields a sharp maximum centered at the tracks direction is observed. At low fields we identify a lock-in phase characterized by an angle-independent pinning strength and observe an angular shift of the peak towards the c axis that originates in the misalignment between vortices and applied field in anisotropic materials. The interplay among columnar defects, twins, and intrinsic pinning by the ab planes generates a variety of staircase structures. We show that correlated pinning dominates for all orientations of the applied field. [S0163-1829(99)09417-5].  
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  ISSN 0163-1829 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:000080778700035 Approved no  
  Call Number BT @ hernan @ Serial 233  
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