2009 Fiscal Year Final Research Report
Clarifying the Microscopic Mechanism of Photo-Ionic Phenomena in Ion Conducting Chalcogenide Glasses
| Project/Area Number |
19560014
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Applied materials science/Crystal engineering
|
|---|
| Research Institution | Kumamoto University |
|---|
Principal Investigator |
ANIYA Masaru Kumamoto University, 大学院・自然科学研究科, 教授 (30221724)
|
|---|
| Project Period (FY) |
2007 – 2009
|
| Keywords | 非晶質 / イオン伝導 |
|---|
| Research Abstract |
It is discovered that the power law dependence of the ac ionic conductivity observed in ion conducting glasses is related with the medium range structure of the glasses. The result indicates that the universality of the power law exponent observed in many materials contains information of the pattern of the potential profile at intermediate length scales. By analyzing the photodoping phenomena observed in amorphous chalcogenides from the point of view of fragility, it was discovered that the amount of Ag doped is maxima at the composition where the fragility of Ge-S is minimum. It is discovered that the nonlinear optical constant of ionic conducting glasses is very large compared with other glasses. The origin of such a behavior has been studied from a chemical bond point of view. The study has revealed the importance of the Ag d-electrons, and that the mechanism of ion transport based on bond fluctuation processes plays also a fundamental role in the photoinduced phenomena.
|
