2002/02/07 by Nurit Avraham, Boris Khaykovich, Yuri Myasoedov +17
Physics and Astronomy · #Advanced Condensed Matter Physics #Composite material #Condensed matter physics #First order #Geometry #Inverse #Lattice (music) #Magnetic field #Magnetic properties of thin films #Magnetization #Materials science #Melting point #Phase transition #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Superconductivity #Thermodynamics #Vortex #cond-mat.supr-con
paper · pdf · doi:10.1016/s0921-4534(01)01218-7
9 pages, 6 figures, Physica C, in press
arxiv created 2002/02/07 · openalex publication_date 2002/03/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Vortex matter phase transitions in the high-temperature superconductor Bi2Sr2CaCu2O8 were studied using local magnetization measurements combined with a vortex 'shaking' technique. The measurements revealed thermodynamic evidence of a first-order transition along the second magnetization peak line, at temperatures below the apparent critical point Tcp. We found that the first-order transition line does not terminate at Tcp, but continues down to at least 30 K. This observation suggests that the ordered vortex lattice phase is destroyed through a unified first-order transition that changes its character from thermally induced melting at high temperatures to a disorder-induced transition at low temperatures. At intermediate temperatures the transition line shows an upturn, which implies that the vortex matter displays 'inverse' melting behavior.