| Project/Area Number |
22654037
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Condensed matter physics II
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| Research Institution | Iwate University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
HAGA Yoshinori (独)日本原子力研究開発機構, 先端基礎研究センター, 主任研究員 (90354901)
HONMA Yoshiya 東北大学, 金属材料研究所, 助教 (00260448)
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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 |
¥3,080,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥480,000)
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: ¥1,000,000 (Direct Cost: ¥1,000,000)
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| Keywords | ウラン化合物 / 超音波物性 / 低温 / 強磁場 / 超音波測定 / パルス磁場 / 量子臨界点 / 超ウラン化合物 / 多極子秩序 |
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| Research Abstract |
We have investigated the elastic properties of UR_<u2>Si_2 by using ultrasonic measurements in the pulsed magnetic field. The elastic constant C_E=(C_<11>-C_<12>)/2 shows characteristic softening towards low temperatures as a function of temperature. The softening disappears beyond 36 T of the quantum critical point in this system. It is very similar to that of C_<66> in iron-based superconductor Ba(Fe_<1-x>Co_x)2A_<s2>. This fact suggests strongly that C_E is correlated with the formation of hidden order.
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