Elastic and Transport Properties in Spin-ordered Solid Helium Three

自旋有序固体氦三的弹性和输运特性

• 批准号: 8803301
• 负责人: Douglas Osheroff
• 金额: $ 38.09万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-07-01 至 1991-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8803301&HistoricalAwards=false
• 关键词: Elastic; Transport; Properties; Spin; ordered

Professor Osheroff will determine properties of the nuclear antiferromagnetism in solid 3He to provide increased understanding of cooperative magnetic phenomena. The sub-milliKelvin solid growth techniques which the PI pioneered will be used in measurements of the nuclear magnetic resonance (NMR), heat flow, and sound propagation phenomena. The strong temperature dependence of the antiferromagnetic resonance will be used to measure the entire thermal distribution across a heat carrying single crystal. Thermal diffusivities will be determined as well as various magnon scattering probabilities. From sound studies the solid elastic constants of the ordered phases and the tensor components of the magnetic Gruneisen constant will be measured. Lattice distortions will be obtained from the NMR studies.

Osheroff教授将确定 固体3He中的核反铁磁性， 理解合作磁现象。 的 PI开创的亚毫开尔文固体生长技术 将用于测量 共振（NMR）、热流和声传播现象。 的 反铁磁共振的强温度依赖性 将被用来测量整个热分布在一个 载热单晶。 热扩散率将为 确定以及各种磁振子散射概率。 从声音研究固体弹性常数的有序 磁Gruneisen的相位和张量分量 常数将被测量。 将获得晶格畸变 从核磁共振研究中。