Magnetic Ordering in Solid 3He

9800712亚当斯这是一个低温物理实验项目。这项研究将利用佛罗里达大学的Microkelvin实验室，以及佛罗里达大学和佛罗里达州立大学的国家高磁场实验室的设施。本文主要研究氦的同位素固体氦-3的磁学和热力学性质。固体氦-3随磁场和温度的变化呈现出新颖而复杂的磁相。反铁磁有序体心立方氦-3从高场相到顺磁相的转变将在以前没有的磁场和温度下被研究。第二个研究将使用级联磁化技术来研究六方密排相在微开尔文范围内的铁磁有序。第三个项目将研究氦-4基质中冷冻氦-3液滴的磁性。氦-4是氦的另一种更常见的同位素。在这里，表面效应以一种未知的方式影响氦-3的磁性。这项研究为研究生和博士后在极端(低温)和超高磁场下的物质性质的尖端研究提供了极好的培训。这一背景为学生在从基础研究到技术领域的一系列就业机会的职业生涯做好准备。这是一个低温物理实验项目。这项研究将利用佛罗里达大学的Microkelvin实验室，以及佛罗里达大学和佛罗里达州立大学的国家高磁场实验室的设施。本文研究了氦的一种同位素--磁性有序固体氦-3的磁学和热力学性质。固体氦-3是一种模型磁性材料，其磁相随磁场和温度的变化而变化。它的新奇之处在于，只有在超低温和超高磁场下才能发现这些相。因此，这项研究需要只有世界上少数几个实验室才能使用的独特仪器，包括佛罗里达大学和佛罗里达州立大学。这些实验将研究氦-3在绝对零度几百万分之一的温度范围内，以及磁场强度是地球磁场强度10亿倍的情况下的磁性。这些结果是基本感兴趣的，但与磁性随温度或磁场变化的所有磁场相关。这项研究为研究生和博士后在极端(低温)和超高磁场下的物质性质的尖端研究提供了极好的培训。这一背景为学生在从基础研究到技术领域的一系列就业机会的职业生涯做好准备。***

9800712 Adams This is an experimental project in low temperature physics. The research will employ the facilities at the Microkelvin Laboratory at the University of Florida, and the National High Magnetic Field Laboratory at the University of Florida and Florida State University. The research focuses on magnetic and thermodynamic properties of solid Helium-3, an isotope of Helium. Solid Helium- 3 exhibits novel and complex magnetic phases as a function of magnetic field and temperature. The transition from the high- field phase to the paramagnetic phase of anti-ferromagnetically ordered body-centered-cubic Helium-3 will be investigated at magnetic fields and temperatures previously unavailable. A second investigation will use the technique of cascade magnetization to study ferromagnetic ordering of the hexagonal-close-packed phase at temperatures in the microKelvin range. A third project will study the magnetism of droplets of frozen Helium-3 in a matrix of Helium-4, the other and more common isotope of Helium. Here surface effects influence the magnetic properties of the Helium-3 in ways that are not understood. The research provides excellent training of graduate students and post-doctoral associates in cutting-edge research in the properties of matter at extremes of (low) temperature and ultra-high magnetic fields. This background prepares the students for careers in a range of employment opportunities, from basic research to technological areas. %%% This is an experimental project in low temperature physics. The research will employ the facilities at the Microkelvin Laboratory at the University of Florida, and the National High Magnetic Field Laboratory at the University of Florida and Florida State University. The research focuses on the magnetic and thermodynamic properties of magnetically ordered solid Helium-3, an isotope of Helium. Solid Helium-3 is a model magnetic mat erial that exhibits complex magnetic phases as a function of magnetic field and temperature. It is novel in that these phases are found only at ultra-low temperatures and at ultra-high magnetic fields. The research therefore demands unique instrumentation available only at a few laboratories in the world, including the University of Florida and Florida State University. The experiments will investigate the magnetic properties of Helium-3 at temperatures within a few millionths of absolute zero, and at magnetic fields that are a billion times the strength of the earth's magnetic field. The results are of fundamental interest but are relevant to all fields of magnetism where magnetic properties vary with temperature or magnetic field. The research provides excellent training of graduate students and post-doctoral associates in cutting-edge research in the properties of matter at extremes of (low) temperature and ultra-high magnetic fields. This background prepares the students for careers in a range of employment opportunities, from basic research to technological areas. ***