抄録
The structure of crystalline and amorphous GeCu2Te3 phase change material was investigated by x-ray absorption fine structure. The averaged interatomic distances of Ge-Te and Cu-Te in the crystal phase are confirmed to contradict the x-ray diffraction data, and are mostly equal to the experimental data in the amorphous phase. As regards the coordination numbers, the atomic configurations around the Ge atoms are a small modification of the crystalline one, while those around the Cu atoms are quite different and the large number of the Cu-Cu homopolar coordination become an important role in the amorphous phase. The x-ray absorption near edge structure data near the Ge K edge show a similarity of the local atomic configurations around the Ge atoms between the crystalline and amorphous GeCu2Te3. However, those near the Cu K edge indicate a large smearing-out on the amorphization, corresponding the large differences in the atomic configurations around the Cu atoms.
本文言語 | 英語 |
---|---|
ページ(範囲) | 248-253 |
ページ数 | 6 |
ジャーナル | Journal of Optoelectronics and Advanced Materials |
巻 | 18 |
号 | 3-4 |
出版ステータス | 出版済み - 2016/03/01 |
ASJC Scopus 主題領域
- 電子材料、光学材料、および磁性材料
- 原子分子物理学および光学
- 凝縮系物理学
- 電子工学および電気工学