<?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%">V. Likodimos</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%">Electron spin resonance and microwave absorption study of MgB2</style></title><secondary-title><style face="normal" font="default" size="100%">Physical Review B - Condensed Matter and Materials Physics</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2002</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.scopus.com/inward/record.uri?eid=2-s2.0-0013123210&amp;partnerID=40&amp;md5=e9994c1c933315cbdb01ae826e73fb37</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">17</style></number><volume><style face="normal" font="default" size="100%">65</style></volume><pages><style face="normal" font="default" size="100%">1725071-1725074</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">A comparative study of powder and bulk specimens of MgB2 by electron spin resonance (ESR) verifies the presence of intense conduction electron spin resonance (CESR) in the normal state. A low concentration paramagnetic center stemmimg from the initial amoprhous boron powder along with traces of Fe3+ impurities are identified in the ESR spectra. Intense microwave absorption, that distorts CESR below Tc, is observed in fine powders implying enhanced microwave dissipation due to the viscous flux motion.</style></abstract><notes><style face="normal" font="default" size="100%">cited By 9</style></notes></record></records></xml>