In-Plane Positional Fluctuations of Zinc Atoms in Single Crystal Mg₈₅Zn₆Y₉ Alloy Studied by X-ray Fluorescence Holography

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  • Kimura Koji
    Department of Physical Science and Engineering, Nagoya Institute of Technology
  • Hayashi Kouichi
    Department of Physical Science and Engineering, Nagoya Institute of Technology
  • Hagihara Koji
    Department of Adaptive Machine Systems, Graduate School of Engineering, Osaka University
  • Izuno Hitoshi
    Department of Adaptive Machine Systems, Graduate School of Engineering, Osaka University
  • Happo Naohisa
    Department of Computer and Network Engineering, Graduate School of Information Sciences, Hiroshima City University
  • Hosokawa Shinya
    Department of Physics, Kumamoto University
  • Suzuki Motohiro
    Japan Synchrotron Radiation Research Institute (JASRI), SPring-8
  • Tajiri Hiroo
    Japan Synchrotron Radiation Research Institute (JASRI), SPring-8

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  • In-Plane Positional Fluctuations of Zinc Atoms in Single Crystal Mg<sub>85</sub>Zn<sub>6</sub>Y<sub>9</sub> Alloy Studied by X-ray Fluorescence Holography

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<p>We performed X-ray fluorescence holography measurements on a single crystal Mg85Zn6Y9 alloy, having a synchronized 18R long period stacking ordered structure, and successfully obtained Zn Kα holograms. The reconstruction shows “U”-shaped atomic images in remarkable contrast to the prediction of an existing model with Zn6Y8 L12 clusters. To explain this feature we calculated holograms using a model with positional fluctuations, and fit the reconstruction to the experimental results. It was found that large rotational fluctuations of the clusters can explain the “U”-shaped images.</p>

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