Strongly-correlated electron system on pyrochlore-type oxides with metal-insulator transition
| Project/Area Number |
22550129
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Functional materials chemistry
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| Research Institution | Doshisha University |
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Principal Investigator |
KATO Masaki 同志社大学, 理工学部, 教授 (90271006)
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2010: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 金属絶縁体転移 / 電子相関 / 遷移金属酸化物 / スピングラス / 金属－絶縁体転移 / パイロクロア型酸化物 / スピンフラストレーション / 反強磁性 / 金属-絶縁体転移 / 金属-絶緑体転移 |
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| Research Abstract |
The pyrochlore ruthenates Pb2-xLnxRu2O7- (Ln = Y, Nd) have been successfully synthesized by the solid-state reaction. The solid-solution compounds of Pb2-xLnxRu2O7- (Ln = Y, Nd) undergo a crossover from metallic (x = 0) to insulating (x = 2) with increasing x. Owing to a localized magnetic moment on Ru site, these compounds with x > 0.2 also indicate the spin-glass like behaviors at low temperature (T < TSG). As a result of electric resistivity measurements, the samples with 0.4 ? χ ? 0.8 show the metal-insulator transition. In the metallic region, values of electric resistivity obey T2 dependencies which indicate the strongly correlated electron behaviors in this system.
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Report
(4 results)
Research Products
(24 results)
