Time-of-Flight Neutron Diffraction Study of Amorphous and Liquid Ge–Te Alloys
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- Kameda Yasuo
- Department of Material and Biological Chemistry, Faculty of Science, Yamagata University
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- Uemura Osamu
- Department of Material and Biological Chemistry, Faculty of Science, Yamagata University
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- Usuki Takeshi
- Department of Material and Biological Chemistry, Faculty of Science, Yamagata University
書誌事項
- タイトル別名
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- Time-of-Flight Neutron Diffraction Study of Amorphous and Liquid Ge–Te Alloys
- Time-of-Flight Neutron Diffraction Stud
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The short-range structure in amorphous and liquid GexTe1−x alloys with x≤0.33 has been investigated through time-of-flight neutron diffraction measurements. The first sharp diffraction peak (FSDP) in the structure factor was observed in the amorphous state, implying that the structural units are partially connected each other, while, the FSDP was not obviously seen in the liquid state. The position and area (relating the coordination number) of the first peak in the amorphous distribution function were quite different from those in the liquid function. The difference function between distribution functions at x=0.16 and 0.20, indicated that the first coordination shell in the alloy is composed of two nearest neighbor correlations, i.e., Ge–Te and Te–Te. It was clarified from the first peak position of the difference function that both Ge–Te and Te–Te distances are 259 and 276 pm in the amorphous state, and 267 and 292 pm in the liquid state, respectively. After all, it can be concluded that Ge–Te alloys have a different local structure and different bonding nature among crystalline, amorphous and liquid states. These bonding differences result in a sharp change of electronic properties such as the magnetic susceptibility around crystallization and liquidus temperature.
収録刊行物
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- Materials Transactions, JIM
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Materials Transactions, JIM 37 (11), 1655-1658, 1996
社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390282679225034496
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- NII論文ID
- 130003556603
- 10002450896
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- NII書誌ID
- AA10699969
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- COI
- 1:CAS:528:DyaK2sXntFKntg%3D%3D
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- ISSN
- 2432471X
- 09161821
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- NDL書誌ID
- 4090709
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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