<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Stamopoulos, D.</style></author><author><style face="normal" font="default" size="100%">Pissas, M.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Hysteretic behavior of the vortex lattice at the onset of the second peak for the HgBa2CuO4+delta superconductor</style></title><secondary-title><style face="normal" font="default" size="100%">PHYSICAL REVIEW B</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2002</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2002</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">65</style></volume><isbn><style face="normal" font="default" size="100%">2469-99502469-9969</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">By means of local Hall probe ac and dc permeability measurements, we investigate the phase diagram of vortex matter for the HgBa2CuO4+delta superconductor in the regime near critical temperature. The second peak line H-sp, in contrast to what is usually assumed, does not terminate at the critical temperature. Our local ac permeability measurements reveal a pronounced hysteretic behavior and thermomagnetic history effects near the onset of the second peak, giving evidence of a phase transition of vortex matter from an ordered qausilattice state to a disordered glass.</style></abstract><issue><style face="normal" font="default" size="100%">13</style></issue></record></records></xml>