First order phase transition at the irreversibility line of
- 2 May 1994
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 72 (18), 2951-2954
- https://doi.org/10.1103/physrevlett.72.2951
Abstract
Magnetization and susceptibility measurements show a first order phase transition in the magnetic flux structure at the irreversibility line of 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 0.06 per vortex layer, at the transition. Above 360 Oe the irreversibility line has the known frequency dependence.
Keywords
This publication has 16 references indexed in Scilit:
- Direct observation of magnetic flux lattice melting and decomposition in the high-Tc superconductor Bi2.15Sr1.95CaCu2O8+xNature, 1993
- Loss of interplane correlation inBi2Sr2CaCu2O8single crystalsPhysical Review B, 1993
- Vortex lattice melting in untwinned and twinned single crystals ofPhysical Review Letters, 1992
- Experimental evidence for a first-order vortex-lattice-melting transition in untwinned, single crystalPhysical Review Letters, 1992
- SQUID picovoltometry of single crystal : Observation of the crossover from high-temperature Arrhenius to low-temperature vortex-glass behaviorPhysical Review Letters, 1992
- Flux-lattice melting, anisotropy, and the role of interlayer coupling in Bi-Sr-Ca-Cu-O single crystalsPhysical Review B, 1991
- Thermal fluctuations and phase transitions in the vortex state of a layered superconductorPhysical Review B, 1991
- Thermal fluctuations, quenched disorder, phase transitions, and transport in type-II superconductorsPhysical Review B, 1991
- Resistive transition of crystalline Y1Ba2Cu3O7−x in magnetic fieldsCryogenics, 1990
- Experimental evidence for vortex-glass superconductivity in Y-Ba-Cu-OPhysical Review Letters, 1989