Experiments on Magnetic Superfluid State of Liquid Helium-3

提出了在超低温、强磁场条件下探索He-3液体A-1相磁性超流体性质的Kojima实验。A-1相的温度宽度将通过开发声学温度计来测量。超流体部分将使用自旋/熵波传播技术进行测量。自旋弛豫将通过一种新型的机械装置来测量自旋密度。所有这些测量都建议从我们以前的最大场5特斯拉扩展到15特斯拉。液态氦-3将承受低至0.001开尔文的温度和高达150000高斯的磁场。在这种条件下，液态氦-3转变成一种独特的磁性超流体状态。研究的重点将是在超低温下测量磁极化对超流体状态的影响。热力学、流体力学和磁性能将在拟议的实验中使用声学和机械设备进行研究。对超流体状态的更好理解可以应用于更熟悉的金属超导状态的研究。＊＊＊

9510306 Kojima Experiments are proposed to explore the properties of the magnetic superfluid A-1 phase of liquid He-3 at ultra low temperatures and in high magnetic fields. The temperature width of the A-1 phase will be measured by developing an acoustic thermometer. The superfluid fraction will be measured using spin/entropy wave propagation techniques. The spin relaxation will be measured by a novel mechanical device to detect spin density. All of these measurements are proposed to be extended from our previous maximum field of 5 tesla up to 15 tesla. %%% Liquid Helium-3 will be subjected to temperatures down to 0.001 degrees Kelvin and to magnetic fields as high as 150,000 gauss. Under these conditions, liquid Helium-3 transforms into a unique magnetic superfluid state. The focus of research will be to measure the effects of the magnetic polarization on the superfluid state at ultra low temperatures. Thermodynamic, hydrodynamic and magnetic properties will be investigated using acoustic and mechanical devices in the proposed experiments. Better understanding of the superfluid state might be applied to studies of more familiar superconducting states of metals. ***