中国物理B ›› 1995, Vol. 4 ›› Issue (6): 457-461.doi: 10.1088/1004-423X/4/6/008
罗有泉1, 卢国荣1, 张志友2, 梁兵3
LUO YOU-QUAN (罗有泉)a, LU GUO-RONG (卢国荣)a, ZHANG ZHI-YOU (张志友)b, LIANG BING (梁兵)c
摘要: Dy2Fe17-xGax (x = 0,1,2,3,4, 5 and 6) compounds were prepared by arc melting. These compounds are of single phase, having a hexagonal Th2Ni17-type structure fox x=0 and rhombohedral Th2Zn17-type structure for x≥1. The substitution of Ga for Fe in the Dy2Fe17 leads to a linear increase of unit-cell volumes. The saturation magnetization Ms at 1.5K is found to decrease linearly with increasing Ga concentration, from 65emu/g for x= 0 to 5emu/g for x = 6; and the Fe magnetic moment μFe is almost independent of Ga concentration. The Curie temperature TC is found first to increase with increasing Ga content x, and goes through a maximum value of 559 K at about x = 3, then decreases. The sharp increase of TC at lower Ga content may result from the increase of unit cell volumes. Dy2Fe17-xGax compounds with x≤5 exhibit easy plane anisotropy at room temperature, and those with x = 6 possess easy-axis.
中图分类号: (Alloys )