<?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%">Calamiotou, M.</style></author><author><style face="normal" font="default" size="100%">Gantis, A.</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 copper defects in the mixed phase La0.5Gd0.5Ba2Cu3Oy</style></title><secondary-title><style face="normal" font="default" size="100%">Radiation Effects and Defects in Solids</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-s2.0-0033281638&amp;doi=10.1080%2f10420159908245950&amp;partnerID=40&amp;md5=8319418388dcb4f879153b0a803b2220</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">1</style></number><volume><style face="normal" font="default" size="100%">151</style></volume><pages><style face="normal" font="default" size="100%">151-157</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">XRD, magnetic and EPR studies of the mixed phase La0.5Gd0.5Ba2Cu3Oy high-Tc superconductor after prolonged (one year) `aging' at room temperature are reported. Within this time period a pronounced change of the superconducting behavior and the homogeneity of the diamagnetic shielding signal accompanied by substantial structural changes, reduction of the impurity phase BaCuO2+x and increase of the EPR spectrum's intensity of Cu2+ magnetic defects is detected. The `aging' effects are related to strain-relaxation taking place during room temperature annealing that induces the formation of Cu2+ defect centers.</style></abstract><notes><style face="normal" font="default" size="100%">cited By 0</style></notes></record></records></xml>