MRI: Acquisition of a Cryogen-Free Physical Properties Measurement System (PPMS DynaCool) for Quantum Materials Research and Education at NSU

MRI：为 NSU 的量子材料研究和教育购买无冷冻剂物理特性测量系统 (PPMS DynaCool)

• 批准号: 2117588
• 负责人: Doyle Temple
• 金额: $ 74.16万
• 依托单位: Norfolk State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-10-01 至 2023-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2117588&HistoricalAwards=false
• 关键词: MRI; Acquisition; Cryogen; Free; Physical

Non-Technical AbstractThis Major Research Instrumentation (MRI) award will enable the purchase and installation of a Cryogen-Free Physical Property Measurement System (PPMS) that will be used for research and education training in fabrication and characterization of new quantum materials and devices. The instrument will be located in the Norfolk State University McDemmond Center for Applied Research (MCAR) and will be available for use by faculty and students. It will also be the only instrument of its kind in the Hampton Roads area with MCAR being centrally a location within a 45 minute drive of six other universities, four community colleges, the Thomas Jefferson National Accelerator Facility, the NASA Langley Research Center, and the Eastern Virginia Medical School, none of which have local access to this type of equipment. The PPMS system will be used to characterize both basic materials properties and device performance in an accurately controlled environment including temperature and applied magnetic field. This system will have a direct impact on the education, research training, and professional development of at least 20 MS and PhD students in the NSU material science and engineering graduate programs, and over 30 NSU undergraduate STEM majors with the majority of all the participants coming from groups traditionally underrepresented in STEM fields. The impact on undergraduates will result from individual student research projects and research training through modules developed for advanced laboratory courses.Technical AbstractThis major instrumentation is an important addition to Norfolk State University’s materials research infrastructure and will support diverse interdisciplinary materials research projects ranging from fundamental studies of quantum materials, signatures of novel spin-textures in noncentrosymmetric magnets, topological effects and critical phenomena, characterization of novel organic semiconductor and hybrid materials, magnetic nanoparticles for biomedical applications and thin films of rare-earth magnetocaloric and magneto-elastic materials. The Physical Properties Measurement System is equipped with an integrated conduction-cooled superconducting 14 Tesla magnet which is recognized as state-of-the-art high magnetic field and low-temperature system with exceptional stability and sensitivity. This system can cool the sample chamber from room-temperature down to 1.9 K in less than 40 minutes. A dilution refrigerator insert provides the capability to conduct measurements down to 50 mK, essential for probing quantum mechanical phenomena in materials. The sample chamber accommodates a wide range of measurement inserts, all of which allow fully automated data acquisition under computer control over the full range of magnetic field and temperature. A multi-function probe accommodates custom experiments, and a horizontal sample rotator allows magnetoresistance measurements as a function of sample orientation relative to magnetic field. This system provides the capability to measure electrical resistivity, thermal conductivity, Hall Effect, and other thermoelectric properties, as well as susceptibility and magnetization. The closed-cycle cryogen-free feature of this system ensures cost-effective and reliable long-term operation of the equipment.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.

非技术摘要本主要研究仪器（MRI）奖将使购买和安装一个无低温物理性能测量系统（PPMS），将用于研究和教育培训的制造和表征新的量子材料和设备。该仪器将位于诺福克州立大学麦克德蒙德应用研究中心（MCAR），并将提供给教师和学生使用。这也将是唯一的仪器在汉普顿道路地区与MCAR是一个中心位置在45分钟的车程内的其他六所大学，四个社区学院，托马斯杰斐逊国家加速器设施，美国宇航局兰利研究中心，和东弗吉尼亚医学院，其中没有一个本地访问这种类型的设备。PPMS系统将用于在精确控制的环境（包括温度和外加磁场）中表征基本材料特性和器械性能。该系统将对NSU材料科学与工程研究生课程中至少20名MS和博士生的教育，研究培训和专业发展产生直接影响，以及超过30名NSU本科STEM专业，其中大多数参与者来自传统上在STEM领域代表性不足的群体。对本科生的影响将导致通过先进的实验室课程开发模块的学生个人研究项目和研究培训。技术摘要这一主要仪器是一个重要的除了诺福克州立大学的材料研究基础设施，并将支持各种跨学科的材料研究项目，从量子材料的基础研究，签名的新自旋纹理的非中心对称磁体，拓扑效应和临界现象、新型有机半导体和混合材料的表征、用于生物医学应用的磁性纳米颗粒以及稀土磁热和磁弹性材料薄膜。物理性能测量系统配备了集成的传导冷却超导14特斯拉磁体，该磁体被公认为最先进的高磁场和低温系统，具有出色的稳定性和灵敏度。该系统可以在40分钟内将样品室从室温冷却到1.9K。稀释制冷机插入件提供了进行低至50 mK测量的能力，这对于探测材料中的量子力学现象至关重要。样品室可容纳各种测量插件，所有这些都允许在计算机控制下在整个磁场和温度范围内进行全自动数据采集。多功能探头可进行定制实验，水平样本旋转器可根据样本相对于磁场的方向进行磁电阻测量。该系统能够测量电阻率、热导率、霍尔效应和其他热电特性，以及磁化率和磁化强度。该系统的封闭循环无冷冻剂特性确保了设备的成本效益和可靠的长期运行。该奖项反映了NSF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。