%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