2012 Fiscal Year Final Research Report
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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| 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 |
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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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[Journal Article] HIP synthesis of η-carbide-type nitrides Fe3W3N and Fe6W6N and their magnetic properties2011
Author(s)
T. Waki, S. Terazawa, Y. Tabata, Y. Murase, M. Kato, K. Hirota, S. Ikeda, H. Kobayashi, K. Sato, K. Kindo, H. Nakamura
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Journal Title
J. Alloy. Compd
Volume: 506
Pages: 9451-9455
DOI
Peer Reviewed
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