| Project/Area Number |
26410062
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Inorganic chemistry
|
|---|
| Research Institution | Hokkaido University |
|---|
Principal Investigator |
Hinatsu Yukio 北海道大学, 理学研究院, 特任教授 (70271707)
|
|---|
| Research Collaborator |
OHTSUKA SHUNPEI 北海道大学, 大学院理学院化学専攻
NISHIYAMA ATSUHIDE 北海道大学, 大学院理学院化学専攻
INABAYASHI MASAKI 北海道大学, 大学院理学院化学専攻
TAKAGI YURI 北海道大学, 大学院理学院化学専攻
ENDO TAKESHI 北海道大学, 大学院理学院化学専攻
|
|---|
| Project Period (FY) |
2014-04-01 – 2017-03-31
|
| Project Status |
Completed (Fiscal Year 2016)
|
| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
|
|---|
| Keywords | 希土類 / ペロブスカイト / 結晶構造 / 磁気的性質 / ぺロブスカイト / レニウム / ルテニウム / イリジウム / フェリ磁性 / ビスマス / アンチモン |
|---|
| Outline of Final Research Achievements |
The perovskite-type compounds containing both rare earth and rhenium Sr2LnReO6 (Ln = Y, Tb-Lu) have been prepared. Powder X-ray diffraction measurements and Rietveld analysis show that Ln3+ and Re5+ ions are structurally ordered at the B site of the perovskite SrBO3. Magnetic anomalies are found in their magnetic susceptibility and specific heat measurements at 2.6-20 K for Ln = Y, Tb, Yb, Lu compounds. They are due to magnetic interactions between Re5+ ions. The results of the magnetic hysteresis and remnant magnetization measurements for Sr2YReO6 and Sr2LuReO6 indicate that the antiferromagnetic interactions between Re5+ ions below transition temperatures have a weak ferromagnetic component. For the case of Sr2DyReO6, magnetic ordering of the Re5+ moments occurs at 93K, and with decreasing temperature, the moments of Dy3+ ferromagnetically order at 5 K from the measurements of magnetic susceptibility and specific heat.
|
