| Project/Area Number |
22760516
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (B)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Inorganic materials/Physical properties
|
|---|
| Research Institution | National Institute for Materials Science |
|---|
Principal Investigator |
KIKUGAWA Naoki 独立行政法人物質・材料研究機構, 超伝導物性ユニット, 主任研究員 (00442731)
|
|---|
| Project Period (FY) |
2010 – 2011
|
| Project Status |
Completed (Fiscal Year 2011)
|
| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2010: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
|
|---|
| Keywords | ルテニウム酸化物 / 不純物置換効果 / 非磁性不純物効果 / 金属-絶縁体転移 / 巨大磁気抵抗効果 / 単結晶薄膜 / 少数キャリア性電子状態 / 半導体的電気伝導 |
|---|
| Research Abstract |
Layered perovskite ruthenates show a variety of novel physical properties, for instance, spin-triplet superconductivity and magnetism. In this study, we particularly focused on a bi-layered calcium-ruthenate, Ca_3Ru_2O_7, in order to clarify its fruitful phenomena originating from 4d degenerate t_<2g> orbitals. Surprisingly, we observed "metal-insulator transition" when we partly substitute nonmagnetic Ti^<4+> for Ru^<4+>. We also detected a novel magneto-transport property on this substituted system.
|
