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Author (up) H. Pastoriza, M. F. Goffman, A. Arribére, and F. de la Cruz url  openurl
  Title First order phase transition at the irreversibility line of Bi$2$Sr$2$CaCu$_2$O8+? Type Journal Article
  Year 1994 Publication Phys. Rev. Lett. Abbreviated Journal  
  Volume 72 Issue 18 Pages 2951-2954  
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  Abstract Magnetization and susceptibility measurements show a first order phase transition in the magnetic flux structure at the irreversibility line of Bi2Sr2CaCu2O8+ delta single crystals, in the field range 0<H<360 Oe. The resistivity in the c direction drops 5 orders of magnitude in less than 0.1 K, and there is a discontiuous change in the magnetization at the same temperature. The change in magnetization together with the Clausius-Clapeyron equation gives a variation of entropy of 0.06kB per vortex layer, at the transition. Above 360 Oe the irreversibility line has the known frequency dependence.  
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  Call Number BT @ hernan @ pastoriza94e Serial 34  
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