<?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><author><style face="normal" font="default" size="100%">Moraitakis, E.</style></author><author><style face="normal" font="default" size="100%">Kallias, G.</style></author><author><style face="normal" font="default" size="100%">Niarchos, D.</style></author><author><style face="normal" font="default" size="100%">Charalambous, M.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Magnetic phase diagram in a HgBa2CuO4+delta single crystal</style></title><secondary-title><style face="normal" font="default" size="100%">PHYSICA C</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">1999</style></year><pub-dates><date><style  face="normal" font="default" size="100%">1999</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">317</style></volume><pages><style face="normal" font="default" size="100%">658 - 660</style></pages><isbn><style face="normal" font="default" size="100%">0921-4534</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The irreversibility magnetic field H-irr(T) decreases exponentially in the temperature range 20 less than or equal to T less than or equal to 88 K. At T* approximate to 88 K, the H-irr(T) curve changes slope abruptly and a new mechanism controls the irreversibility up to T-c. The hysteresis loops measurements (H parallel to c) show a second peak for 5 less than or equal to T less than or equal to 50 K. Relaxation measurements performed in the region of the second peak show, at constant temperature, that effective activation energy U-o(H) first increases up to H-sp'(T) and then decreases for H &gt; H-sp'(T). H-sp'(T) is located lower than the field H-sp(T) deduced from the hysteresis loops. (C) 1999 Elsevier Science B.V. All rights reserved.</style></abstract><issue><style face="normal" font="default" size="100%">1st Euroconference on Anomalous Complex Superconductors</style></issue></record></records></xml>