| Project Area | Novel States of Matter Induced by Frustration |
|---|
| Project/Area Number |
19052008
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research on Priority Areas
|
| Allocation Type | Single-year Grants |
|---|
| Review Section |
Science and Engineering
|
|---|
| Research Institution | Tokyo University of Agriculture and Technology (2010-2011)
The Institute of Physical and Chemical Research (2007-2009) |
|---|
Principal Investigator |
KATORI Hiroko 東京農工大学, 大学院・工学研究院, 教授 (10211707)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
TAKAGI Hidenori 東京大学, 大学院・理学系研究科, 教授 (40187935)
MOTOME Yukitoshi 東京大学, 大学院・工学研究科, 准教授 (40323274)
FUJIYAMA Shigeki 理研, 高木磁性研究室, 専任研究員 (00342634)
東 正樹 東京工業大学, 応用セラミックス研究所, 教授 (40273510)
松田 雅昌 独立行政法人日本原子力研究開発機構, 量子ビーム応用研究部門, 研究主幹 (90260190)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
AZUMA Masaki 東京工業大学, 応用セラミックス研究所, 教授 (40273510)
|
|---|
| Research Collaborator |
MATSUDA Masaaki 米国オークリッジ国立研究所 (90260190)
|
|---|
| Project Period (FY) |
2007 – 2011
|
| Project Status |
Completed (Fiscal Year 2011)
|
| Budget Amount *help |
¥140,600,000 (Direct Cost: ¥140,600,000)
Fiscal Year 2011: ¥19,000,000 (Direct Cost: ¥19,000,000)
Fiscal Year 2010: ¥30,400,000 (Direct Cost: ¥30,400,000)
Fiscal Year 2009: ¥30,400,000 (Direct Cost: ¥30,400,000)
Fiscal Year 2008: ¥30,400,000 (Direct Cost: ¥30,400,000)
Fiscal Year 2007: ¥30,400,000 (Direct Cost: ¥30,400,000)
|
|---|
| Keywords | フラストレーション / 磁気秩序 / スピン液体状態 / 磁場誘起相転移 / 磁性 / 相転移 / 格子自由度 / スピン自由度 / 電荷自由度 / 軌道自由度 / カゴメ格子 / パイロクロア格子 / 磁気交換相互作用 / 電荷秩序 / 軌道秩序 |
|---|
| Research Abstract |
We had aimed at the development of the novel material which has a geometrical frustration and a complex entanglement of degrees of freedom, and the discovery of the new function those novel materials have. As a result, we found out new materials, such as Na_4Ir_3O_8 which forms hyper-Kagome structure, honeycomb compound Bi_3Mn_4O_12(NO_3), and perovskite compound Sr_2IrO_4 , and clarified the details of those physical properties both experimentally and theoretically. Moreover, we found out novel perovskite compound Bi_<1-x>La_x NiO_3 which shows about 3 times as large negative thermal expansion as the existing materials.
|
