中国物理B ›› 1995, Vol. 4 ›› Issue (6): 457-461.doi: 10.1088/1004-423X/4/6/008

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EFFECT OF THE SUBSTITUTION OF Ga ON THE STRUCTURE AND MAGNETIC PROPERTIES OF Dy2Fe17 COMPOUND

罗有泉1, 卢国荣1, 张志友2, 梁兵3   

  1. (1)Department of Physics, University of Science and Technology of China, Hefei 230026, China; (2)Department of Physics, Yantai University, Yantai 264005, China; (3)Institute of Physics, Academia Sinica, Beijing 100080), China
  • 收稿日期:1994-11-26 出版日期:1995-06-20 发布日期:1995-06-20

EFFECT OF THE SUBSTITUTION OF Ga ON THE STRUCTURE AND MAGNETIC PROPERTIES OF Dy2Fe17 COMPOUND

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   

  1. a Department of Physics, University of Science and Technology of China, Hefei 230026, China; b Department of Physics, Yantai University, Yantai 264005, China; c Institute of Physics, Academia Sinica, Beijing 100080), China
  • Received:1994-11-26 Online:1995-06-20 Published:1995-06-20

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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.

Abstract: 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 $\mu$Fe 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 )

  • 61.66.Dk
75.30.Cr (Saturation moments and magnetic susceptibilities) 75.30.Gw (Magnetic anisotropy) 75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)) 75.50.Bb (Fe and its alloys) 81.05.Bx (Metals, semimetals, and alloys)