中国物理B ›› 1997, Vol. 6 ›› Issue (12): 895-900.doi: 10.1088/1004-423X/6/12/003

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EFFECT OF MANGANESE SUBSTITUTION IN R2AlFe16-x Mnx(R=Y,Ho,Nd AND Pr)COMPOUNDS ON STRUCTURAL AND MAGNETIC PROPERTIES

郝延明, 严启伟, 张泮霖, 孙向东, 王芳卫, 沈保根   

  1. State Key Laboratory of Magnetism,Institute of Physics and Center for Condensed Matter Physics, Academia Sinica,Beijing 100080,China
  • 收稿日期:1996-10-14 出版日期:1997-12-20 发布日期:1997-12-20

EFFECT OF MANGANESE SUBSTITUTION IN R2AlFe16-x Mnx(R=Y,Ho,Nd AND Pr)COMPOUNDS ON STRUCTURAL AND MAGNETIC PROPERTIES

HAO YAN-MING (郝延明), YAN QI-WEI (严启伟), ZHANG PAN-LIN (张泮霖), SUN XIANG-DONG (孙向东), WANG FANG-WEI (王芳卫), SHEN BAO-GEN (沈保根)   

  1. State Key Laboratory of Magnetism,Institute of Physics and Center for Condensed Matter Physics, Academia Sinica,Beijing 100080,China
  • Received:1996-10-14 Online:1997-12-20 Published:1997-12-20

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摘要： The structural and magnetic properties of R2AlFe16-xMnx(0≤x≤8 for Y,Ho,0≤x≤10 for Pr, 0≤x≤16 for Nd)compounds have been investigated by means of X-ray diffraction and magnetization measurements.The R2AlFe16-xMnx compounds have a hexagonal Th2Ni17-type structure for R=Y and Ho, and a rhombohedral Th2Zn17-type structure for Nd and Pr.With increasing x,the unit-cell volumes have a small increase initially,followed by a greater linear increase.The Curie temperature and the saturation magnetizati on of these compounds show marvelous drop with increasing x.Compensation point was observed in the temperature dependence of the magnetization for Ho2AlFe12Mn4 compound.

Abstract: The structural and magnetic properties of R2AlFe16-xMnx(0≤x≤8 for Y,Ho,0≤x≤10 for Pr, 0≤x≤16 for Nd) compounds have been investigated by means of X-ray diffraction and magnetization measurements.The R2AlFe16-xMnx compounds have a hexagonal Th2Ni17-type structure for R=Y and Ho, and a rhombohedral Th2Zn17-type structure for Nd and Pr.With increasing x, the unit-cell volumes have a small increase initially,followed by a greater linear increase.The Curie temperature and the saturation magnetizati on of these compounds show marvelous drop with increasing x. Compensation point was observed in the temperature dependence of the magnetization for Ho2AlFe12Mn4 compound.

中图分类号:  (Magnetization curves, hysteresis, Barkhausen and related effects)

  • 75.60.Ej
75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.)) 61.05.cp (X-ray diffraction) 61.66.Dk (Alloys ) 75.30.Cr (Saturation moments and magnetic susceptibilities)