Structure analysis of icosahedral quasicrystals containing rare-earth elements and related complex metallic alloys
| Project/Area Number |
15K04659
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Crystal engineering
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 準結晶 / 非周期結晶構造解析 / 正20面体準結晶 / Tsai型クラスター / フェイゾン / 結晶評価 / 結晶工学 / 高次元結晶構造解析 / 非周期長距離秩序 / 希土類元素 / フェイゾン歪 / Ｘ線多重回折 |
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| Outline of Final Research Achievements |
In this project, experimental and theoretical investigations have been conducted focusing on icosahedral quasicrystals containing rare-earth elements, in order to gain structural knowledge about unsolved Tsai-type icosahedral quasicrystals. Several icosahedral quasicrystal structures, which include R-Cd(R=Gd,Dy,Tm), Yb-Cd-Mg, and Sc-Zn icosahedral quasicrystls, have been determined by means of single-crystal X-ray diffraction. In addition, it has been revealed that a substantial amount of diffuse scattering with anisotropic distribution, located around the strong Bragg peaks, observed in Sc-Zn icosahedral quasicrystls can be fully interpreted as resulting from phason fluctuations associated with the chemical disorder of Sc sites form an absolute measurement of diffuse X-ray scattering.
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Report
(4 results)
Research Products
(36 results)
