Magnetism of quantum crystal and crystal growth control

量子晶体的磁性与晶体生长控制

• 批准号: 17071004
• 负责人: OKUDA Yuichi
• 金额: $ 49.22万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17071004/
• 关键词: 量子固体; 多体交換; フラストレーション; 低次元; スピン液体; 超流動; NMR,結晶成長; 結晶成長; 固体4He; アエロジェル; 超流動3He; MRI

The magnetization curve for two dimensional 3He on a triangular lattice was obtained at 1 mK, revealing a 1/2 plateau at 1.2-2.2 T and a shoulder at 2.5 T. To understand them the multiple spin exchange parameters are essential but it was found up to 6 bodies exchange parameters are not enough to explain the results. NMR signal from very dilute 3He atoms solved in solid 4He was successfully detected and it was found that 3He forms a small stable cluster. The growth mechanism of solid 4He in the porous aerogel was found due to a nucleation.

在1 mK下，得到了二维~ 3 He在三角晶格上的磁化曲线，在1.2- 2.2T处出现1/2平台，在2.5T处出现肩台。为了理解它们，多个自旋交换参数是必不可少的，但是发现多达6个体交换参数不足以解释结果。成功地探测到了~ 3 He原子在固体~ 4 He中形成稳定的小团簇的NMR信号。固体4 He在多孔气凝胶中的生长机制是成核。

项目成果

Spin wave and vortex excitations of superfluid He-3-A in parallel-plate geometry

平行板几何中超流体 He-3-A 的自旋波和涡旋激发

• 发表时间: 2008
• 期刊: PHYS. REV. LETT. 101
• 作者: Yamashita M;Izumina K;Matsubara A;Y. Sasaki;et al.
• 通讯作者: et al.

Spin Wave and Vortex Excitations of Superfluid ^3He-A in Parallel-plate Geometry

平行板几何中超流体^3He-A的自旋波和涡旋激发

• 发表时间: 2008
• 期刊: Phys. Rev. Lett. 101
• 作者: M. Yamashita;K. Izumina;A. Matsubara;Y. Sasaki;O. Ishikawa;T. Takagi;M. Kubota and T.Mizusaki
• 通讯作者: M. Kubota and T.Mizusaki

Faraday instability of crystallization waves in 4He

4He 结晶波的法拉第不稳定性

• 发表时间: 2007
• 期刊: Journal of Physics: Conference Series 92
• 作者: H. Abe;T. Ueda;M. Morikawa;Y. Saitoh;R. Nomura and Y. Okuda
• 通讯作者: R. Nomura and Y. Okuda

Construction of ULT-MRI cryostat for ultra low temperature physics

用于超低温物理的ULT-MRI低温恒温器的构建

• 发表时间: 2007
• 期刊: J. Mag. Mag. Mat. 310
• 作者: T.Tanaka;M.Yatsuya;Y.Sasaki;T.Mizusaki
• 通讯作者: T.Mizusaki

Faraday instability of superfluid surface.

• DOI: 10.1103/physreve.76.046305
• 发表时间: 2007-10
• 期刊: Physical review. E, Statistical, nonlinear, and soft matter physics
• 作者: H. Abe;T. Ueda;M. Morikawa;Y. Saitoh;R. Nomura;Y. Okuda