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Structures and magnetic properties of Co and CoFe films prepared by magnetron sputtering

机译：磁控溅射制备Co和CoFe薄膜的结构和磁性

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摘要

Structures and magnetic properties of Co and CoFe films on Si(100) have been investigated by employing scanning tunneling microscopy, atomic force microscopy, and magneto-optic Ken" effect techniques. As the film thickness increases, Co or CoFe clusters with different sizes are observed. As the film thickness increases below 20 nm, the size of the metal clusters decreases. For thicker films, the surface roughness increases monotonously by increasing the thickness. The easy axis of magnetization for both Co/Si(100) and CoFe/Si (100) prefers to be in the surface plane. By deposition of the Co or CoFe overlayers, the evolution of the longitudinal coercive force shows similar trend to the surface roughness. Minimum coercive force coincides with the smallest roughness of the film. For a film with greater roughness, the observation of larger coercive force could be explained by the impediment of the propagation of domain wall motion by defects of the films. At a higher deposition rate, Co islands in triangle shapes with an edge length around 100 nm are observed. This nanostructure shows an hep-Co with the c axis parallel to the surface plane and is observed to be able to stabilize the coercive force for Co/Si(100) films.
机译：利用扫描隧道显微镜，原子力显微镜和磁光肯氏效应技术研究了Si（100）上Co和CoFe薄膜的结构和磁性。随着薄膜厚度的增加，不同尺寸的Co或CoFe团簇逐渐增大。当膜厚度增加到20 nm以下时，金属簇的尺寸减小；对于较厚的膜，表面粗糙度通过增加厚度而单调增加； Co / Si（100）和CoFe / Si的易磁化轴（100）更倾向于在表面上，通过沉积Co或CoFe叠层，纵向矫顽力的变化趋势与表面粗糙度相似，最小矫顽力与薄膜的最小粗糙度相吻合。在较大的粗糙度下，观察到较大的矫顽力可以用薄膜缺陷阻碍畴壁运动的传播来解释。观察到边缘长度为100 nm左右的三角形凸脊。此纳米结构显示出c-轴平行于表面平面的hep-Co，并且可以稳定Co / Si（100）薄膜的矫顽力。

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  • 来源
    《Thin Solid Films》 |2011年第23期|p.8379-8383|共5页
  • 作者

    C.H. Lin; W.H. Chen; J.S. Tsay; I.T. Hong; C.H. Chiu; H.S. Huang;

  • 作者单位

    Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan;

    Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan;

    Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan;

    New Materials Research & Development Dept, China Steel Corporation, Kaohsiung 81233, Taiwan;

    New Materials Research & Development Dept, China Steel Corporation, Kaohsiung 81233, Taiwan;

    New Materials Research & Development Dept, China Steel Corporation, Kaohsiung 81233, Taiwan;

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  • 正文语种 eng
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  • 关键词

    cobalt; cofe; magneto-optic kerr effect; magnetron sputtering;

    机译：钴;咖啡磁光克尔效应磁控溅射;

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