2010 Fiscal Year Final Research Report
Evaluation of bonding nature in Al-based quasicrystals by positron annihilation spectroscopy
| Project/Area Number |
21860021
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Physical properties of metals
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| Research Institution | The University of Tokyo |
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Principal Investigator |
TAKAGIWA Yoshiki The University of Tokyo, 大学院・新領域創成科学研究科, 助教 (90549594)
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| Project Period (FY) |
2009 – 2010
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| Keywords | 金属物性 / 格子欠陥 / 環境材料 / 廃熱利用 |
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| Research Abstract |
Our main goal is to establish a method of evaluation of bonding-nature in Al-based quasicrystals by positron annihilation spectroscopy. Al-based quasicrystals, which possess the pseudogap near the Fermi level, are novel candidates for new thermoelectric materials.
We observed the clear correlation between the positron annihilation rate and electrical conductivity in various Al-based quasicrystals and related materials. The present correlation can be used to discuss the bonding nature in icosahedral clusters of the Al-based QCs. Establishing a method of evaluating the bonding nature of the Al-based QCs is necessary for future designs of material, such as thermoelectric materials.
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