中国物理B ›› 1997, Vol. 6 ›› Issue (6): 445-455.doi: 10.1088/1004-423X/6/6/007

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FORMATION AND MAGNETIC PROPERTIES OF NEW COMPOUNDS R3Fe29-xCrx(R=Y,Ce,Nd,Sm,Gd,Tb,and Dy)

韩秀峰, 杨伏明, 刘洪利, 潘洪革   

  1. State Key Laboratory for magnetism, Institute of Physics, Academia Sinica, Beijing 100080, China
  • 收稿日期:1996-07-24 修回日期:1996-08-15 出版日期:1997-06-20 发布日期:1997-06-20
  • 基金资助:
    Project supported by the National Natural Science Foundati on of China and in part by the China Postdoctoral Science Foundation.

FORMATION AND MAGNETIC PROPERTIES OF NEW COMPOUNDS R3Fe29-xCrx (R=Y,Ce,Nd,Sm,Gd,Tb,and Dy)

HAN XIU-FENG (韩秀峰), YANG FU-MING (杨伏明), LIU HONG-LI (刘洪利), PAN HONG-GE (潘洪革)   

  1. State Key Laboratory for magnetism, Institute of Physics, Academia Sinica, Beijing 100080, China
  • Received:1996-07-24 Revised:1996-08-15 Online:1997-06-20 Published:1997-06-20
  • Supported by:
    Project supported by the National Natural Science Foundati on of China and in part by the China Postdoctoral Science Foundation.

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摘要： A systematic investigation of structure and magnetic properties of the new R3Fe29-xCrx compounds(R=Y,Ce,Nd,Sm,Gd, Tb,and Dy)has been performed. The Curie temperature of R3Fe29-xCrx increased with increasing atomic number fromR=Ce to Gd and de creased from Gd to Dy. The saturation magnetization of R3Fe29-xCrx at 4.2 K decreased gradually with increasing atomic number from R=Y to Dy,except for Ce. The spin reorientations of the easy magnetization d irection were observed at around 230 K for Nd3Fe24.5Cr4.5 and 180 K for Tb3Fe28.0Cr1.0,and the magnetohistory effects were obser ved for Nd3Fe24.5Cr4.5 and Sm3Fe24.0Cr5.0 in a low field of about 0.04 T. First order magnetization process occurs in magnetic field of around 2.3 T at room temperature for Tb3Fe28.0Cr1.0. The saturation magnetization of Y3Fe27.2Cr1.8 at 4.2 K is 52.2μB/f.u., which corresponds to an average magnetic moment of 1.92μB per each Fe atom.

Abstract: A systematic investigation of structure and magnetic properties of the new R3Fe29-xCrx compounds(R=Y,Ce,Nd,Sm,Gd, Tb,and Dy)has been performed. The Curie temperature of R3Fe29-xCrx increased with increasing atomic number from R=Ce to Gd and de creased from Gd to Dy. The saturation magnetization of R3Fe29-xCrx at 4.2 K decreased gradually with increasing atomic number from R=Y to Dy,except for Ce. The spin reorientations of the easy magnetization direction were observed at around 230 K for Nd3Fe24.5Cr4.5 and 180 K for Tb3Fe28.0Cr1.0, and the magnetohistory effects were obser ved for Nd3Fe24.5Cr4.5 and Sm3Fe24.0Cr5.0 in a low field of about 0.04 T. First order magnetization process occurs in magnetic field of around 2.3 T at room temperature for Tb3Fe28.0Cr1.0. The saturation magnetization of Y3Fe27.2Cr1.8 at 4.2 K is 52.2μB/f.u., which corresponds to an average magnetic moment of 1.92μB per each Fe atom.

中图分类号:  (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))

  • 75.30.Kz
75.30.Cr (Saturation moments and magnetic susceptibilities) 75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects) 75.50.Bb (Fe and its alloys)