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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
1997 (6):
445-455.
doi: 10.1088/1004-423X/6/6/007
摘要
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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 fromR=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.
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