2010 Fiscal Year Final Research Report
Experimental Visualization of Valence Charge Density Distribution in Ferroelectric materials
| Project/Area Number |
20560010
|
|---|
| 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 | Hiroshima University |
|---|
Principal Investigator |
KUROIWA Yoshihiro Hiroshima University, 大学院・理学研究科, 教授 (40225280)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
MORIYOSHI Chikako 広島大学, 大学院・理学研究科, 准教授 (00325143)
|
|---|
| Project Period (FY) |
2008 – 2010
|
| Keywords | 強誘電体 / ペロブスカイト / X線回折 / 電子密度 / 放射光 |
|---|
| Research Abstract |
Development of the experimental technique on the visualization of valence charge density distributions has been carried out associated with the phase transitions, dielectric properties and states of chemical bonding in ferroelectric materials. Direct evidence of the electron polarization in PbTiO_3 is demonstrated by analyzing high energy synchrotron radiation diffraction data using the MEM/Rietveld method. The relationship between the bonding electron density and the phase transition temperature is clarified for the BaTiO_3-based ceramics. The crystal structures of several ferroelectric materials with peculiar oxygen coordination are analyzed at electron charge density levels.
|
-
-
-
-
-
-
-
[Journal Article] Luminescence Mechanism of (Pr, Al) -Doped SrTiO_3 Fine Particle Investigated by X-Ray Absorption Spectroscopy2008
Author(s)
M.Deguchi, N.Naka jima, K.Kawakami, N.I shimatsu, H.Maruyama, C.Moriyoshi, Y, Kuroiwa, S.Nozawa, K.I shi ji, T.Iwazumi
-
Journal Title
Phys.Rev.B 78
Pages: 073103-1-073103-4
Peer Reviewed
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
