Study of a new quantum atomic effect and development of new multiferroic materials
| Project/Area Number |
26289092
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Partial Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Electronic materials/Electric materials
|
|---|
| Research Institution | Saga University |
|---|
Principal Investigator |
Zheng Xu-Guang 佐賀大学, 工学(系)研究科(研究院), 教授 (40236063)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
真木 一 佐賀大学, 工学(系)研究科(研究院), 准教授 (10359945)
山内 一宏 佐賀大学, 工学(系)研究科(研究院), 特任助教 (60444395)
|
|---|
| Research Collaborator |
MENG Dong-Dong
XU Xing-Liang
YAMAGUCHI Satoshi
OFUJI Ayumi
OKA Yuki
NAKANIWA Shou
YANASE Takuya
NUMANO Takeshi
YUASA Takahiro
|
|---|
| Project Period (FY) |
2014-04-01 – 2017-03-31
|
| Project Status |
Completed (Fiscal Year 2017)
|
| Budget Amount *help |
¥15,730,000 (Direct Cost: ¥12,100,000、Indirect Cost: ¥3,630,000)
Fiscal Year 2016: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2015: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2014: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
|
|---|
| Keywords | 水素原子量子効果 / 強誘電性 / 水酸塩化物 / マルチフェロ / 強誘電体 / 量子原子効果 / 幾何学的フラストレーション / 水素秩序 / 電子・電気材料 / 誘電体物性 / 量子エレクトロニクス / 新奇強誘電性 / 同位体効果 / 電気磁気材料 |
|---|
| Outline of Final Research Achievements |
Hydroxyl salts M2(OH)3X, where M represents a d-electron magnetic ion such as Cu, Co, Ni, Mn, or Fe and X represents the halogen ions Cl, Br, or I have been known for a long time. In recent years, these hydroxyl salts have attracted attention because our finding of their geometrically frustrated magnetism. Our latest finding was the ferroelectric-like responses in the deuterated hydroxyl salts with the highest crystal symmetry, i.e., rhombohedral Co2(OD)3Cl and Co2(OD)3Br, at temperatures of 220-230 K through an isotope effect, showing phenomenological similarity to proton type ferroelectricity.This research involved an extensive study of hydroxyl salts utilizing muon-spin-relaxation (muSR), NMR, Raman spectroscopy and neutron diffraction, supplemented by dielectric constant, magnetic susceptibility and heat capacity measurements, and has revealed a unique multiferroic system with deuterium-order-type ferroelectricity correlated to the geometrically frustrated magnetism.
|
Report
(4 results)
Research Products
(16 results)
-
-
-
-
-
-
-
-
-
-
-
[Presentation] New Ferroelectric Transitions in Magnetic Hydroxyl Salts Co2(OD)3Cl and Co2(OD)3Br2015
Author(s)
X.G. Zheng, X.L. Xu, D.D. Meng, S. Yamaguchi, A. Ohfuji, M. Maki, Q.X. Guo, I. Watanabe, S.H. Lee, P. Miao, S. Torii, T. Kamiyama, C.N. Xu
Organizer
4th International Conference on New Frontiers in Physics
Place of Presentation
Conference Center of the Orthodox Academy of Creta (OAC), Greece
Year and Date
2015-08-24
Related Report
Int'l Joint Research
-
-
-
-
-
