Browsing Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering by Author "Gammel, P. L."

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    • Article  

      Experimental evidence for a multicritical point in the magnetic phase diagram for the mixed state of clean untwinned YBa2Cu3O7 

      Safar, H.; Gammel, P. L.; Huse, D. A.; Bishop, D. J.; Lee, W. C.; Giapintzakis, John; Ginsberg, D. M. (1993)
      We report on transport measurements in fields up to 16 T in clean, untwinned single crystals of YBa2Cu3O7 which indicate that there is a critical end point for first-order melting in the H-T phase diagram in the mixed state ...
    • Article  

      Vortex dynamics below the flux-lattice melting transition in YBa2Cu3O7- 

      Safar, H.; Gammel, P. L.; Huse, D. A.; Alers, G. B.; Bishop, D. J.; Lee, W. C.; Giapintzakis, John; Ginsberg, D. M. (1995)
      We report measurements of the critical current, differential resistance, and voltage noise below the vortex-lattice melting transition in clean, untwinned YBa2Cu3O7- crystals. The differential resistance at dc current bias ...
    • Article  

      Vortex-motion-induced voltage noise in YBa2Cu3O7- single crystals 

      D'Anna, G.; Gammel, P. L.; Safar, H.; Alers, G. B.; Bishop, D. J.; Giapintzakis, John; Ginsberg, D. M. (1995)
      We have investigated vortex motion below the quasistatic melting transition in a detwinned YBa2Cu3O7- single crystal by measuring the differential resistance and the voltage noise. With the magnetic field parallel to the ...