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

Koji Kimura; Kouichi Hayashi; Koji Hagihara; Hitoshi Izuno; Naohisa Happo; Shinya Hosokawa; Motohiro Suzuki; Hiroo Tajiri

doi:10.2320/matertrans.M2016459

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

Koji Kimura, Kouichi Hayashi, Koji Hagihara, Hitoshi Izuno, Naohisa Happo, Shinya Hosokawa, Motohiro Suzuki, Hiroo Tajiri

Author information

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

Keywords: magnesium alloys, synchronized long-period stacking ordered phase, local structure, x-ray fluorescence holography

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2017 Volume 58 Issue 4 Pages 539-542

DOI https://doi.org/10.2320/matertrans.M2016459

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Abstract

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.

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