CAJ | 학술논문

利用Rietveld分析方法对Er2Fe17-xAlx(x=2，5)在室温下的中子衍射实验数据进行了精修。Er2Fe-Al2化合物具有Th2Ni17型六角结构，空间群为P63/mmc,Al原子分别占据12j（占位数0.21）和12k(占位数0.13)位；Er2Fe12Al5化合物具有Th2Zn17型三角结构，空间群为R3m，Al原子分别占据18f（占位数0.35）、18h（占位数0.36）和6c（占位数0.37）位。所有的Fe原子磁矩间为铁磁性耦合。Er原子磁矩与Fe原子磁矩间为亚铁磁耦合。在2个样品中，磁矩均位于垂直于六重轴的平面内，呈面磁晶各向异性。给出了居里温度TC，并对磁性能和结构之间的关系进行了简单的讨论。
이용Rietveld분석방법대Er2Fe17-xAlx(x=2，5)재실온하적중자연사실험수거진행료정수。Er2Fe-Al2화합물구유Th2Ni17형륙각결구，공간군위P63/mmc,Al원자분별점거12j（점위수0.21）화12k(점위수0.13)위；Er2Fe12Al5화합물구유Th2Zn17형삼각결구，공간군위R3m，Al원자분별점거18f（점위수0.35）、18h（점위수0.36）화6c（점위수0.37）위。소유적Fe원자자구간위철자성우합。Er원자자구여Fe원자자구간위아철자우합。재2개양품중，자구균위우수직우륙중축적평면내，정면자정각향이성。급출료거리온도TC，병대자성능화결구지간적관계진행료간단적토론。
The crystallographic and magnetic structures of Er2Fe15Al2 andEr2Fe12Al5 have been refined by Rietveld analysis of neutron diffraction data at room temperature.The refined results indicate that Er2Fe15Al2 compound has Th2Ni17 type (space group:P63/mmc) hexagonal structure and Er2Fe12Al5 has Th2Zn17 type (space group:R3m) rhombohedral structure.The Al atoms prefer to 12j and 12k sites in Er2Fe15Al2,and prefer to 18f,18h and 6c sites in Er2Fe12Al5.The moments lie in the plane perpendicular to the six-fold axis and exhibit planar magnetic anisotropy in both samples.