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钆钴非晶合金薄膜的电子衍射研究

李方华 王荫君 高俊杰 滕晨明 常龙存

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钆钴非晶合金薄膜的电子衍射研究

李方华, 王荫君, 高俊杰, 滕晨明, 常龙存

ELECTRON DIFFRACTION INVESTIGATION OF AMORPHOUS Gd-Co ALLOY FILMS

LI FANG-HUA, WANG YIN-JUN, GAO JUN-JIE, TENG CHEN-MING, CHANG LONG-CUN
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  • 用电子衍射方法研究了一些非晶钆钴合金磁性薄膜的结构,用Lorentz电子显微技术观察了其相应的磁结构。在所有薄膜的电子衍射图上均可清楚地看见七个弥散衍射环,其中两个最小的环分布在s-1(s=2sinθ/λ)的范围内。在不同的薄膜中观察到磁泡或平面畴结构。本文就这种由两种原子半径相差较大的元素,如稀土和过渡元素构成的非晶合金,讨论了如何只根据s-1范围内的衍射强度峰形,直接、定性地了解稀土与稀土原子、稀土与过渡族原子以及过渡族与过渡族原子之间最近邻配位数相对大小的问题。也讨论了钆钴薄膜相分离对磁各向异性的影响。
    Electron diffraction technique was used to study the structure of various amorphous films of Gd-Co alloy and Lorentz electron microscopy was used to observe the related magnetic structure. Seven halos could be seen clearly in all the electron diffraction patterns obtained and the two smallest halos were located in the range s-1 (s = (2sinθ)/λ). Magnetic bubbles or in-plane domain structures wereobserved in these amorphous films. For amorphous alloys of this type consisting of two elements, such as rare-earth and transition metals with a large difference in atomic radius, we showed how to derive directly and qualitatively the relative co-ordination number of nearest neighbours between rare-earth metal atoms, - between transition metal atoms, and between rare-earth and transition metal atoms, merely from the diffraction intensity profiles in the range s-1. The influence of phase separation in the film on the magnetic anisotropy was also discussed.
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  • 文章访问数:  7073
  • PDF下载量:  670
  • 被引次数: 0
出版历程
  • 收稿日期:  1978-12-25
  • 刊出日期:  1980-01-05

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