中国物理B ›› 1998, Vol. 7 ›› Issue (9): 655-661.doi: 10.1088/1004-423X/7/9/003

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DEPENDENCE OF DOMAIN STRUCTURES ON Au THICKNESS IN Co/Au MULTILAYER FILMS

徐海, 李建, 韩宝善, 王荫君   

  1. State Key Laboratory of Magnetism, Institute of Physics, Academia Sinica, Beijing 100080, China
  • 收稿日期:1998-01-20 出版日期:1998-09-20 发布日期:1998-09-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China under the Grant No. 19474070.

DEPENDENCE OF DOMAIN STRUCTURES ON Au THICKNESS IN Co/Au MULTILAYER FILMS

Xu Hai (徐海), Li Jian (李建), Han Bao-shan (韩宝善), Wang Yin-jun (王荫君)   

  1. State Key Laboratory of Magnetism, Institute of Physics, Academia Sinica, Beijing 100080, China
  • Received:1998-01-20 Online:1998-09-20 Published:1998-09-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China under the Grant No. 19474070.

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摘要： The magnetic force images and surface topography images of sputtered Co/Au multilayer films in remnant state were measured by magnetic force microscopy. From the surface magnetic structures shown in the magnetic force images it can be seen that the domain pattern and size vary with the increase of the thickness t of the non-ferromagnetic Au layer remarkably. With the measurements of the effective perpendicular anisotropy Ku and the domain period d, it was found that there are similar trends of d and Ku as functions of t. The variations of the domain pattern and size were qualitatively interpreted in terms of magnetic domain theory. the theoretical relations of d and the domain wall energy σw vs t were calculated. As t=8.5 AL(1 AL=0.235 nm), the largest σw is 11 mJ/m2.

Abstract: The magnetic force images and surface topography images of sputtered Co/Au multilayer films in remnant state were measured by magnetic force microscopy. From the surface magnetic structures shown in the magnetic force images it can be seen that the domain pattern and size vary with the increase of the thickness t of the non-ferromagnetic Au layer remarkably. With the measurements of the effective perpendicular anisotropy Ku and the domain period d, it was found that there are similar trends of d and Ku as functions of t. The variations of the domain pattern and size were qualitatively interpreted in terms of magnetic domain theory. the theoretical relations of d and the domain wall energy $\sigma$w vs t were calculated. As t=8.5 AL(1 AL=0.235 nm), the largest $\sigma$w is 11 mJ/m2.

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

  • 75.70.Cn
75.70.Kw (Domain structure (including magnetic bubbles and vortices)) 68.55.-a (Thin film structure and morphology) 68.35.B- (Structure of clean surfaces (and surface reconstruction)) 75.70.Rf (Surface magnetism)