Development of Highly Thermal-Conducting Spin-Materials and Elucidation of the Mechanism of the Thermal Conduction
| Project/Area Number |
22360001
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied materials science/Crystal engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
KOIKE Yoji 東北大学, 大学院・工学研究科, 教授 (70134038)
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| Co-Investigator(Kenkyū-buntansha) |
KAWAMATA Takayuki 東北大学, 大学院・工学研究科, 助教 (00431601)
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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 |
¥18,460,000 (Direct Cost: ¥14,200,000、Indirect Cost: ¥4,260,000)
Fiscal Year 2012: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2011: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2010: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
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| Keywords | 熱伝導 / 単結晶 / 低次元量子スピン系 / 銅酸化物 / 遷移金属化合物 / マグノン / スピノン / スピンによる熱伝導 / １次元スピン系 / スピン梯子格子系 / フラストレーション / コバルト化合物 / ニッケル化合物 / 1次元スピン系 / イジングスピン系 / ボーズ・アインシュタイン凝縮 / トリプロン / 1次元ボンド交替系 / バナジウム酸化物 |
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| Research Abstract |
We have grown high-quality single crystals of low-dimensional quantum-spin systems, measured the thermal conductivity and investigated the mechanism of large thermal conductivity due to spins, in order to develop new electrically insulating and highly thermal-conducting materials using thermal conduction due to spins. As a result, we have found new several factors of large thermal conductivity due to spins as follows. (1)Uniform nearest-neighboring exchange-interaction. (2)Heisenberg spin system. (3)Large quantum-spin-number. (4)Bose-Einstein condensed state of magnetic excitations. (5)Large spin-fluctuations due to spin frustrations.
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Report
(4 results)
Research Products
(45 results)
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[Presentation] 擬1次元スピン系ABX3(A=Rb,Cs;B=Co,Ni;X=Cl,Br)におけるスピンによる熱伝導2012
Author(s)
川股隆行,松岡禎知,成瀬晃樹,大野真澄,西脇洋一,加藤徹也,佐々木孝彦,小池洋二
Organizer
第6回物性科学領域横断研究会
Place of Presentation
東大(本郷)
Year and Date
2012-11-27
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