中国物理B ›› 1997, Vol. 6 ›› Issue (6): 456-465.doi: 10.1088/1004-423X/6/6/008

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MAGNETIC POLARIZATION OF SPACER Pd LAYER AND MAGNETIC PROPERTIES OF Co/Pd MULTILAYERS

T.P.MA1, R.C.BARKER1, 梅良模2, 李民2, 马小丁2, 刘宜华2, 郑敏2, 顾有松3, 麦振洪3, 赵见高3   

  1. (1)Department of Electrical Engineering,Yale University,New Haven CT06520,USA; (2)Department of Physics,Shandong University,Jinan 250100,China; (3)Institute of Physics,Academia Sinica,Beijing 100080,China
  • 收稿日期:1996-09-12 修回日期:1996-10-17 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 Foundation of China and the Doctoral Foundation of the National Education Commission of China.

MAGNETIC POLARIZATION OF SPACER Pd LAYER AND MAGNETIC PROPERTIES OF Co/Pd MULTILAYERS

MEI LIANG-MO (梅良模)a, LI MIN (李民)a, MA XIAO-DING (马小丁)a, LIU YI-HUA (刘宜华)a, ZHENG MIN (郑敏)a, GU YOU-SONG (顾有松)b, MAI ZHEN-HONG (麦振洪)b, ZHAO JIAN-GAO (赵见高)b, T.P.MAc, R.C.BARKERc   

  1. a Department of Physics, Shandong University, Jinan 250100, China; 
    b Institute of Physics,Academia Sinica, Beijing 100080, China;
    c Department of Electrical Engineering, Yale University, New Haven CT06520, USA
  • Received:1996-09-12 Revised:1996-10-17 Online:1997-06-20 Published:1997-06-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China and the Doctoral Foundation of the National Education Commission of China.

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摘要： Magnetic multilayers［Co(1.5 nm)/Pd(x nm)］40 grown by rf sputtering were studied by X-ray diffraction,vibrating sample magnetometer,torque magnetomet er and magnetoresistance measurements.The dependences of the interfacial roughne ss and the structure perfectness of Co/Pd multilayers on the spacer Pd layer thi ckness have been revealed from X-ray diffraction data.An oscillatory variation of saturation magnetization versus the thickness of the Pd spacer was observed.A similar oscillatory behavior in the dependence of its magnetic anisotropy on the thickness of the Pd spacer was observed.It is suggested from these two phenomen a that the magnetic polarization of Pd spacers oscillates between ferromagnetic and antiferromagnetic polarization with the increase of Pd spacer thickness under a RKKY-like interaction.Evidence is found for the antiferromagnetic polarization of the inner part of the Pd spacer.The antiferromagnetic coupling between two Co layers and giant magnetoresistance effect in Co/Pd multilayer system were not observed.The relationship among structure,interlayer coupling and magnetic polarization effect of the Pd spacer was discussed.

Abstract: Magnetic multilayers［Co(1.5 nm)/Pd(x nm)］40 grown by rf sputtering were studied by X-ray diffraction,vibrating sample magnetometer,torque magnetomet er and magnetoresistance measurements.The dependences of the interfacial roughne ss and the structure perfectness of Co/Pd multilayers on the spacer Pd layer thi ckness have been revealed from X-ray diffraction data.An oscillatory variation of saturation magnetization versus the thickness of the Pd spacer was observed.A similar oscillatory behavior in the dependence of its magnetic anisotropy on the thickness of the Pd spacer was observed.It is suggested from these two phenomen a that the magnetic polarization of Pd spacers oscillates between ferromagnetic and antiferromagnetic polarization with the increase of Pd spacer thickness under a RKKY-like interaction.Evidence is found for the antiferromagnetic polarization of the inner part of the Pd spacer.The antiferromagnetic coupling between two Co layers and giant magnetoresistance effect in Co/Pd multilayer system were not observed.The relationship among structure,interlayer coupling and magnetic polarization effect of the Pd spacer was discussed.

中图分类号:  (Magnetic properties of interfaces (multilayers, superlattices, heterostructures))

  • 75.70.Cn
81.15.Cd (Deposition by sputtering) 61.05.cp (X-ray diffraction) 75.47.Np (Metals and alloys) 68.35.Ct (Interface structure and roughness) 75.30.Gw (Magnetic anisotropy)