<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>47</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Simserides, C.</style></author><author><style face="normal" font="default" size="100%">Majewski, J.A.</style></author><author><style face="normal" font="default" size="100%">Trohidou, K.N.</style></author><author><style face="normal" font="default" size="100%">Dietl, T.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Theory of ferromagnetism driven by superexchange in dilute magnetic semi-conductors</style></title><secondary-title><style face="normal" font="default" size="100%">EPJ Web of Conferences</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2014</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.epj-conferences.org/articles/epjconf/abs/2014/12/epjconf_jems2014_01003/epjconf_jems2014_01003.html</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">75</style></volume><pages><style face="normal" font="default" size="100%">01003</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Magnetic properties of Ga&lt;sub&gt;1−&lt;em&gt;x&lt;/em&gt;&lt;/sub&gt;Mn&lt;em&gt;&lt;sub&gt;x&lt;/sub&gt;&lt;/em&gt;N are studied theoretically by employing a tight binding approach to determine exchange integrals &lt;em&gt;J&lt;sub&gt;ij&lt;/sub&gt; &lt;/em&gt;characterizing the coupling between Mn spin pairs located at distances &lt;em&gt;R&lt;sub&gt;ij&lt;/sub&gt;&lt;/em&gt; up to the 16th cation coordination sphere in zinc-blende GaN. It is shown that for a set of experimentally determined input parameters there are no itinerant carriers and the coupling between localized Mn&lt;sup&gt;3+&lt;/sup&gt; spins in GaN proceeds &lt;em&gt;via&lt;/em&gt; superexchange that is ferromagnetic for all explored &lt;em&gt;R&lt;sub&gt;ij&lt;/sub&gt;&lt;/em&gt; values. Extensive Monte Carlo simulations serve to evaluate the magnitudes of Curie temperature &lt;em&gt;T&lt;/em&gt;&lt;sub&gt;C&lt;/sub&gt; by the cumulant crossing method. The theoretical values of &lt;em&gt;T&lt;/em&gt;&lt;sub&gt;C&lt;/sub&gt;(&lt;em&gt;x&lt;/em&gt;) are in quantitative agreement with the experimental data that are available for Ga&lt;sub&gt;1−&lt;em&gt;x&lt;/em&gt;&lt;/sub&gt;Mn&lt;em&gt;&lt;sub&gt;x&lt;/sub&gt;&lt;/em&gt;N with randomly distributed Mn&lt;sup&gt;3+&lt;/sup&gt; ions with the concentrations 0.01 ≤ &lt;em&gt;x&lt;/em&gt; ≤ 0.1.</style></abstract><notes><style face="normal" font="default" size="100%">cited By 7</style></notes></record></records></xml>