Japan JSPS Program: Solid Helium Three Acoustics

该奖项将为西北大学的Harvey Hensley博士与日本京都大学的Takao Mizusaki博士进行合作研究提供补充支持。该团队将应用亨斯利的超声波方法来研究核有序固体氦-3。固体氦-3自从1974年发现在低于1毫开尔文的温度下，固体氦-3中的原子核经历从顺磁状态到核磁有序状态的转变以来，一直引起人们的强烈兴趣。迄今为止，主要是热力学测量和核磁共振（NMR）技术已被用来研究这种转变的性质。Mizusaki在制备固体氦-3单晶和使用核磁共振实验在有序状态下研究它们方面的专业知识补充了Hensley开发的研究超流氦-3的声学方法。利用京都大学先进的低温仪器，研究小组将把亨斯利的声学方法从超流体扩展到固体氦-3，并试图确定核磁有序固体氦-3的低场相结构。

This award will provide supplementary support to enable Dr. Harvey Hensley of Northwestern University to conduct collaborative research with Dr. Takao Mizusaki at Kyoto University, Japan. The team will apply Hensley's ultrasonic methods to study nuclear ordered solid helium-3. Solid helium-3 has been of intense interest since the discovery in 1974 that at temperatures below 1 millikelvin the nuclei in solid Helium-3 undergo a transition from a paramagnetic state to a nuclear magnetically ordered state. To date, primarily thermodynamic measurements and nuclear magnetic resonance (NMR) techniques have been utilized to study the nature of this transition. Mizusaki's expertise in preparing single crystals of solid helium-3 and in studying them in their ordered state using NMR experiments complements the acoustic methods Hensley has developed to study superfluid helium-3. Utilizing the sophisticated cryogenic apparatus at Kyoto University, the team will extend Hensley's acoustic methods from superfluid to solid helium-3 and try to determine the structure of the low field phase of nuclear magnetically ordered solid helium-3.