Dt. Fuchs et al., RESISTIVITY ONSET AT THE FIRST-ORDER VORTEX-LATTICE PHASE-TRANSITION IN BI2SR2CACU2O8, Czechoslovak journal of Physics, 46, 1996, pp. 1583-1584
Simultaneous measurements of resistivity and local magnetization using
microscopic Hall sensors were carried out on Bi2Sr2CaCu2O8 (BSCCO) cr
ystals as a function of applied field and temperature. The resistivity
onset is found to occur concurrently with the first-order vortex-latt
ice phase transition, determined by the equilibrium magnetization step
. This behavior is indicative of a vortex-lattice melting transition.
The resistivity vanishes below the transition although the magnetizati
on remains reversible.