| 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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| 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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