SGER: A Non-Conductive Pressure Cell for Pulsed Magnetic Field Experiments in Anisotropic Superconductors

这个探索性研究（SGER）项目的小赠款将开发一种新型的，非导电的压力电池用于脉冲磁场。 微型气压传感器将由塑料或陶瓷材料设计和制造。 它将在环境压力高达约3千巴时有用。这个范围是很难控制与钳型细胞。 在这个低压范围内，电子材料的性质发生了许多重要而有趣的变化。 该电池将被设计为与隧道二极管振荡器（TDO）一起使用，该振荡器可用于任意小的体积。TDO仪器使用射频信号探测样品的穿透深度、电阻或磁化强度，在直流和脉冲磁场中同样工作良好。 这种独特的组合的TDO在一个压力单元将允许详细研究的物理各向异性有机和重费米子传导系统作为压力的函数。 该电池将用于研究材料的物理结构如何影响其电子结构，以及电子结构如何决定基态。 特别是，有机和重费米子超导体的各向异性性质允许人们消除超导性的轨道破坏，并探测自旋耦合或泡利顺磁极限。 在这个极限下，临界磁场接近塞曼能量和费米能量。研究生和本科生都将参与这个项目。这些学生将有在探索性研究项目工作的经验。他们还将获得设计和建造新仪器的经验。这个探索性研究小额赠款项目（SGER）将开发一种新型的非导电压力电池，用于研究超导体的电子结构。 超导体是一种先进的材料，可以导电而不损失任何电能。 超导体已经被用于制造医院MRI成像所需的高磁场，如果变得更加实用，超导性将彻底改变整个电力行业。 该电池将被设计为与隧道二极管振荡器（TDO）一起使用，该振荡器可用于任意小的体积。 TDO使用无线电信号来探测穿透深度，这是超导材料的基本特性。 TDO在压力单元中的独特组合将允许详细研究各向异性有机和重费米子超导系统作为压力的函数的物理学。 这些系统是层状材料，由于其物理结构而显示出特殊的性质。 该细胞将用于了解材料的物理结构如何影响其电子行为。 特别是，它将被用来理解有机和重费米子超导体的分层结构如何使它们的行为不同于传统的超导体。研究生和本科生都将参与这个项目。这些学生将有在探索性研究项目工作的经验。他们还将获得设计和建造新设备的经验。

This Small Grants for Exploratory Research (SGER) project will develop a novel, non-conducting pressure cell for use in pulsed magnetic fields. The miniature gas pressure cell will be designed and built out of plastic or ceramic materials. It will be useful from ambient pressure up to about 3 kbar. This range is very difficult to control with clamp-type cells. There are many important and interesting changes in the properties of electronic materials in this low-pressure range. The cell will be designed for use with a tunnel diode oscillator (TDO), which can be used in arbitrarily small volumes. The TDO apparatus uses an rf signal to probe the penetration depth, resistance, or magnetization of a sample, and works equally well in dc and pulsed magnetic fields. This unique combination of the TDO in a pressure cell will allow detailed studies of the physics of anisotropic organic and heavy fermion conducting systems as a function of pressure. The cell will be used to study how the physical structure of a material affects its electronic structure, and how the electronic structure determines the ground state. In particular, the anisotropic nature of organic and heavy fermion superconductors allows one to eliminate the orbital destruction of superconductivity and to probe the spin coupling or Pauli paramagnetic limit. In this limit the critical magnetic fields are near both the Zeeman energy and the Fermi energy. Both graduate and undergraduate students will be involved in this project. These students will have the experience of working on an exploratory research project. They will also gain the experience of designing and building new apparatus.This Small Grants for Exploratory Research (SGER) project will develop a novel, non-conducting pressure cell that will be useful to study the electronic structure of superconductors. Superconductors are advanced materials that can conduct electricity without losing any of their electrical energy. Superconductors are already used to make the high magnetic fields necessary for MRI imaging in hospitals, and if made more practical, superconductivity would revolutionize the entire electrical power industry. The cell will be designed for use with a tunnel diode oscillator (TDO), which can be used in arbitrarily small volumes. A TDO uses a radio signal to probe the penetration depth, a fundamental property of superconducting materials. The unique combination of the TDO in a pressure cell will allow detailed studies of the physics of anisotropic organic and heavy fermion superconducting systems as a function of pressure. These systems are layered materials that show special properties because of their physical structure. The cell will be used to learn how the physical structure of a material affects its electronic behavior. In particular it will be used to understand how the layered structure of the organic and heavy fermion superconductors makes them behave differently from traditional superconductors. Both graduate and undergraduate students will be involved in this project. These students will have the experience of working on an exploratory research project. They will also gain the experience of designing and building new apparatus.