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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  
  Keywords  
  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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