%0 Journal Article
%T A possible coupling mechanism between magnetism and dielectric properties in EuTiO3
%A Jiang Qing
%A Wu Hua
%A <br>蒋青
%A 吴华
%J 中国物理 B
%D 2002
%I 
%X The dielectric constant of an incipient ferroelectric EuTiO3 exhibits a sharp decrease at about 5.5K, at which the antiferromagnetic ordering of the Eu spins simultaneously appears. This fact indicates the existence of a coupling between the magnetism and dielectric properties of EuTiO3. We propose a possible coupling mechanism between the magnetic and electrical subsystems as -g\dsuml \dsum〈i,j〉q2l\vec Si·\vec Sj. In the framework of soft-mode theory, we have obtained analytically a dielectric constant expression related to the spin correlation of nearest neighbours of Eu ions.
%K coupling mechanism
%K magnetism
%K dielectric property
%K soft-mode theory<br>铁电体
%K EuTiO3
%K 介电性质
%K 磁化性质
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=57E81C6AA07E00C924F3EE5AC9719468&yid=C3ACC247184A22C1&vid=708DD6B15D2464E8&iid=59906B3B2830C2C5&sid=684DB2D9FF55A0DB&eid=10F17081942653E7&journal_id=1009-1963&journal_name=中国物理&referenced_num=0&reference_num=0