Thermal expansion anomaly and magnetic properties of Nd_2AlFe_(11)Mn_5 compound  

作　　者：赵淼 周严 傅斌 郝延明 

机构地区：[1]Department of Physics, Tianjin Normal University, Tianjin 300074, China

出　　处：《中国有色金属学会会刊：英文版》2006年第1期164-167,共4页Transactions of Nonferrous Metals Society of China

基　　金：Project(50271022) supported by the National Natural Science Foundation of China; Project(1999) supported by the Excellent Young Teachers Program of MOE, China; Project(04362011) supported by the Natural Science Foundation of Tianjin, China

摘　　要：Materials with negative thermal expansion have many important applications such as constituents of composite materials designed to reduce their overall thermal expansion. The structural and magnetic properties of Nd2AlFe11Mn5 compound were investigated by means of X-ray diffraction and magnetization measurements. The result shows that the Nd2AlFe11Mn5 compound crystallizes in a rhomhedral Th2Zn17-type structure. The Curie temperature Tc is about 150 K. The negative thermal expansion coefficient of Nd2AlFe11Mn5 compound is found by X-ray diffraction in temperature range of 122-203 K. There exists an anisotropic and strong positive spontaneous magnetostriction in Nd2AlFe11Mn5 compound. The magnetostriction deformations were discussed.Materials with negative thermal expansion have many important applications such as constituents of composite materials designed to reduce their overall thermal expansion. The structural and magnetic properties of Nd2AlFe11Mn5 compound were investigated by means of X-ray diffraction and magnetization measurements. The result shows that the Nd2AlFe11Mn5 compound crystallizes in a rhomhedral ThEZnlT-type structure. The Curie temperature Tc is about 150 K. The negative thermal expansion coefficient of Nd2AlFe11Mn5 compound is found by X-ray diffraction in temperature range of 122--203 K. There exists an anisotropic and strong positive spontaneous magnetostriction in Nd2AlFe11Mn5 compound. The magnetostriction deformations were discussed.

关 键 词：钕 Nd2AlFe11Mn5 热膨胀 稀土 磁性能 XRD 

分 类 号：TG113.2[金属学及工艺—物理冶金]