<?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%">Guskos, N.</style></author><author><style face="normal" font="default" size="100%">V. Likodimos</style></author><author><style face="normal" font="default" size="100%">Glenis, S.</style></author><author><style face="normal" font="default" size="100%">Nabialek, A.</style></author><author><style face="normal" font="default" size="100%">Szymczak, H.</style></author><author><style face="normal" font="default" size="100%">Wabia, M.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Time evolution of the magnetic properties of la0.5R0.5Ba2Cu3O6+x(R = rare earth) high-Tc superconductors</style></title><secondary-title><style face="normal" font="default" size="100%">Physica C: Superconductivity and its Applications</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">1999</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-4243473744&amp;doi=10.1016%2fS0921-4534%2899%2900129-X&amp;partnerID=40&amp;md5=e470eed51fcf9c496c1d144b826bb3a4</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">317-318</style></volume><pages><style face="normal" font="default" size="100%">558-560</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The magnetic properties of the mixed high-Tc superconductors Ea0.5R0.5Ba2Cu3O6+x (R - rare earth) are studied after prolonged 'aging' at room temperature (RT) for 1 year. Enhancement of the superconducting properties comprising the increase of the inhomogeneous diamagnetic signal for members of the series with the larger R-ion radius is detected after RT 'aging'. For the members with the larger R-ion radius the diamagnetic signal has been come more stronger whereas for the members with the smaller R-ion radius the time evolution of the superconducting properties remained almost the unchanged and the diamagnetic signal slightly decreases after 'aging'. The growth of the EPR intensity of localized Cu2+ centers complying with the rise of the normal-state magnetic susceptibility after prolonged storage at RT, is detected. The time evolution effects are related to slow ion diffusion processes that can be induced by stress-relaxation in the mixed Ea0.5R0.5Ba2Cu3O6+x structure, most pronounced for large R-ion radius. © 1999 Elsevier Science B.V. All rights reserved.</style></abstract><notes><style face="normal" font="default" size="100%">cited By 1</style></notes></record></records></xml>