MRI: Acquisition of Magnetic Property Measurement System

该合同支持获得磁性测量系统（MPMS），这是一种高磁场测量系统，用于测量约翰霍普金斯大学各种材料、地质和化学样品的磁性。该MPMS是一种多功能仪器，可以测量范围广泛的材料系统，具有高样品吞吐率。该仪器将支持约翰霍普金斯大学在凝聚态物理、材料科学、地球物理学和化学物质磁学方面的大量积极研究工作。获得MPMS系统将大大加强约翰霍普金斯大学目前的研究计划，并使新的研究方向成为可能。拟议的仪器将加强对大约12名博士后研究员和20名直接参与拟议研究的研究生的研究培训。由于该仪器将提供给更广泛的约翰霍普金斯研究界，它对研究培训的影响将随着时间的推移而增长。该仪器还将有利于本科生和研究生的实验课程，以及约翰霍普金斯大学已经为高中生、高中教师和本科生开展的以材料研究为重点的广泛教育推广项目。MPMS还将支持NSF资助的paradigm项目。该合同是为了获得磁性测量系统（MPMS），用于测量约翰霍普金斯大学各种材料、地质和化学样品的磁性。该仪器是基于低温低温恒温器，集成超导磁体和超导量子干涉装置（“SQUID”）。所提出的系统有一个磁铁，可以将高达7特斯拉的磁场施加到可变温度的样品室。超出标准T = 1.8至400 K的温度能力，是大多数拟议科学所必需的，将由样品空间烤箱提供，允许高达T = 800 K，以及氦三插入选项，允许低温测量至T = 0.3 K。这项工作将包括跨越广泛科学领域的实验，包括探测相关电子系统，纳米磁体和超导纳米结构，新型超导体，准二维有机导体中的磁性，磁性纳米材料的合成和组装，以及血红素和非血红素金属酶的类似物的研究。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

This award supports the acquisition of a Magnetic Properties Measurement System (MPMS), a high-magnetic-field, measurement system for measuring the magnetic properties of various material, geological, and chemical specimens at Johns Hopkins University. This MPMS is a versatile instrument that can measure a wide range of material systems with a high sample throughput rate. This instrument will support a large and active research effort in condensed matter physics, materials science, geophysics, and magnetism of chemical species at Johns Hopkins University. Acquisition of the MPMS system will significantly enhance current research programs and enable new research directions at Johns Hopkins. The proposed instrument will enhance the research training of the approximately twelve postdoctoral fellows and twenty graduate students directly involved in the proposed research. As the instrument will be made available to the broader Johns Hopkins research community, its impact on research training will grow with time. The instrument will also benefit undergraduate and graduate laboratory courses, and the extensive education outreach programs focusing on materials research that are already in place at Johns Hopkins for high school students, high school teachers, and undergraduates. The MPMS will also support work going on in the NSF funded PARADIM program. This award is for the acquisition of a Magnetic Properties Measurement System (MPMS) for measuring the magnetic properties of various material, geological, and chemical specimens at Johns Hopkins University. The instrument is based on a low-temperature cryostat, an integrated superconducting magnet and a superconducting quantum interference device (a "SQUID"). The proposed system has a magnet that can apply magnetic fields up to 7 Tesla to a variable temperature sample chamber. Temperature capabilities beyond the standard T = 1.8 to 400 K, necessary for much of the proposed science, will be provided by a sample space oven, allowing up to T = 800 K, and a helium three insert option, allowing low temperature measurements down to T = 0.3 K. The work will include experiments that spans a wide range of scientific areas, including probing correlated electron systems, nanomagnets and superconducting nanostructures, new superconductors, magnetism in quasi-two-dimensional organic conductors, synthesis and assembly of magnetic nanomaterials, and investigations of analogs of heme- and non-heme metalloenzymes.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.