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Author (up) Dolz, M.I.; Pastoriza, H. url  openurl
  Title Dependence of vortex phase transitions in mesoscopic Bi2Sr2CaCuO8 superconductor at tilted magnetic fields Type Journal Article
  Year 2009 Publication Journal of Physics: Conference Series Abbreviated Journal  
  Volume 150 Issue 5 Pages 052044-4  
  Abstract A micron sized single crystal of the superconductor Bi2Sr2CaCuO8 was studied using silicon mechanical micro-oscillators at various tilt angles of the dc magnetic field with respect to the c axis of the sample. Different phases of the vortex matter were detected by measuring changes in the value and sign of the oscillator resonant frequency variation with temperature. We could explain the change in the sign of this variation at high temperatures as the transition from the 2D liquid of decoupled pancakes to a reversible 3D vortex lattice. The data indicates that this transition only depends on the magnetic field perpendicular to the superconducting layers while the dissipation involved in this process depends on the component parallel to them.  
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  Notes Approved no  
  Call Number BT @ hernan @ dolz09 Serial 311  
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