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Zeitschrift für Physikalische Chemie

International journal of research in physical chemistry and chemical physics

Editor-in-Chief: Rademann, Klaus


IMPACT FACTOR 2018: 0.975
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2196-7156
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Volume 230, Issue 3

Issues

XAFS Analysis of Crystal GeCu2Te3 Phase Change Material

Kenji Kamimura
  • Corresponding author
  • Department of Physics, Graduate School of Science and Technology, Kumamoto University, Kumamoto, 860-8555, Japan
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/ Koji Kimura
  • Department of Physics, Graduate School of Science and Technology, Kumamoto University, Kumamoto, 860-8555, Japan
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/ Shinya Hosokawa
  • Department of Physics, Graduate School of Science and Technology, Kumamoto University, Kumamoto, 860-8555, Japan
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/ Naohisa Happo
  • Graduate School of Information Sciences, Hiroshima City University, Hiroshima 731-3194, Japan
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/ Hiroyuki Ikemoto / Yuji Sutou
  • Department of Materials Science, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan
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/ Satoshi Shindo
  • Department of Materials Science, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan
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/ Yuta Saito
  • Department of Materials Science, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan
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/ Junichi Koike
  • Department of Materials Science, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan
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Published Online: 2015-11-06 | DOI: https://doi.org/10.1515/zpch-2015-0672

Abstract

The structure of crystal GeCu2Te3 was investigated by X-ray absorption fine structure (XAFS) measurement. We found that the Ge–Te interatomic distances obtained from XAFS are larger than those obtained from X-ray diffraction, and the Cu–Te distances are smaller. The averaged Ge–Te and Cu–Te distances obtained from XAFS are almost equal to the corresponding interatomic distances in amorphous GeCu2Te3. Therefore both crystal and amorphous GeCu2Te3 seem to be built up of the same local configurations of GeTe4 and CuTe4 tetrahedrons. This would be the reason why the phase change in GeCu2Te3 occurs very fast.

Keywords: Phase Change Material; XAFS

About the article

Accepted: 2015-10-13

Received: 2015-07-30

Published Online: 2015-11-06

Published in Print: 2016-03-28


Citation Information: Zeitschrift für Physikalische Chemie, Volume 230, Issue 3, Pages 433–443, ISSN (Online) 2196-7156, ISSN (Print) 0942-9352, DOI: https://doi.org/10.1515/zpch-2015-0672.

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