%0 Journal Article
%T Anomalous thermal expansion of R(Fe, Mo)12 compounds
R(Fe,Mo)12型稀土永磁材料热膨胀反常现象研究
%A Sun Guang-Ai
%A Chen Bo
%A Du Hong-Lin
%A
孙光爱
%A 陈波
%A 杜红林
%J 物理学报
%D 2005
%I
%X The R(Fe, Mo)- 12 (R Nd, Y, Dy) samples have been prepared and measured by x-ray diffraction at different temperatures. The crystal lattice constants and degree of the thermal expansion along the different axes are calculated. As a result, we consider that the abnormally thermal expansion of R(Fe, Mo)- 12 compounds is mainly determined by the Fe-Fe interaction. According to structural parameters of Nd(Fe, Mo)- 12 , the anomaly is caused not only by the short Fe-Fe interaction as the previous explanation on other R-Fe intermetallic compounds but also by the other strongly positive Fe-Fe interactions. The mechanism of the substitution by Mo affecting the thermal expansion anomalies is also discussed.
%K x-ray diffraction
%K R(Fe
%K Mo)_(12) ompounds
%K thermal expansion anomaly
x射线衍射
%K R(Fe
%K Mo)12化合物
%K 热膨胀反常
%K 反常现象
%K 热膨胀
%K 稀土永磁材料
%K x射线粉末衍射
%K 2型
%K 相互作用
%K 晶格常数
%K 结构参数
%K 替代作用
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=99725B9B5E8D6C02&yid=2DD7160C83D0ACED&vid=318E4CC20AED4940&iid=9CF7A0430CBB2DFD&sid=461EFE3B9E224071&eid=0767B6264A97BEEB&journal_id=1000-3290&journal_name=物理学报&referenced_num=2&reference_num=12