%0 Journal Article
%T SPONTANEOUS AND FIELD-INDUCED MAGNETIC PHASE TRANSITIONS IN THE INTERMETALLIC COMPOUND DyMn2Ge2<br>金属间化合物DyMn2Ge2的自发磁相变和场诱导的磁相变
%A GUO GUANG-HUA
%A RZLEVITIN
%A <br>郭光华
%J 物理学报
%D 2001
%I 
%X The temperature dependence of lattice constants a and c of intermetallic compund DyMn2Ge2 is measured in the temperature range 10-800K by using the X-ray method. The magnetoelastic anomaly of lattice constants a is observed at spontaneous magnetic phase transition from paramagnetic state to antiferromagnetic state. The ac magnetic susceptibility of DyMn2Ge2 is measured in the temperature range 4.2-200K. Low temperature magnetic phase transitions in DyMn2Ge2 are discussed in the molecular field approximation by taking into account of next nearest Mn-Mn interlayer exchange interaction. The temperature dependence of magnetization and magnetic curves at different temperatures of DyMn2Ge2 single crystal are calculated. Theoretical calculation shows that the observed field-induced magnetic phase transition in DyMn2Ge2 single crystal at temperature lower than 33K is the transition from ferrimagnetic state into intermediate state.
%K rare earth intermetallic compound
%K magnetic structure
%K magnetic phase transition<br>稀土-过渡族金属间化合物
%K 磁结构
%K 磁相变
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=C6052D22C1D18652&yid=14E7EF987E4155E6&vid=771152D1ADC1C0EB&iid=0B39A22176CE99FB&sid=C2F76551C0111538&eid=3C6F5C97A07587AE&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=9