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.

非技术抽象这项主要研究仪器（MRI）奖将使购买和安装无低温物理特性测量系统（PPMS），该系统将用于用于研究和教育培训新量子材料和设备的研究和教育培训。该仪器将位于诺福克州立大学麦克戴姆蒙德应用研究中心（MCAR），并将被教职员工和学生使用。这也将是汉普顿道路地区唯一的同类工具，MCAR在其他六所大学，四所社区学院，托马斯·杰斐逊国家加速器设施，NASA Langley Research Center和Eastern Virginia医学院的45分钟车程中，在中心位置，这是当地的该类型的设备。 PPMS系统将用于表征基本材料的性能和设备性能在精确控制的环境中，包括温度和磁场。该系统将直接影响NSU Material Science和Engineering研究生课程中至少有20名MS和博士生的教育，研究培训和专业发展，以及超过30多名NSU本科STEM专业的学生，​​其中大多数来自传统群体中的大多数参与者在STEM领域中代表性不足。对高级实验室课程开发的模块的个人研究项目和研究培训对本科生的影响。技术摘要，这是诺福克州立大学的材料研究基础结构的重要补充，并将支持潜水的跨学科材料研究项目，包括对量子材料的基本研究，非新颖的型号且型号的型号，既有型号的基本研究新型有机半导体和杂化材料，用于生物医学应用的磁性纳米颗粒以及稀土磁性和磁弹性材料的薄膜。物理性质测量系统等效于一个集成的传导冷却超导14个特斯拉磁铁，该导入被认为是最新的高磁场和具有出色稳定性和灵敏度的低温系统。该系统可以在不到40分钟的时间内将样品室从室温降低至1.9 K。稀释冰箱插入物提供了对50 mk进行测量的能力，这对于探测材料中的量子机械现象至关重要。样品室可容纳各种测量插入物，所有这些插入物都允许在计算机控制磁场和温度范围内的计算机控制下获取全自动数据。多功能探针可容纳自定义实验，水平样品旋转器允许磁化测量值作为样品方向相对于磁场的函数。该系统提供了测量电阻，导热率，霍尔效应和其他热电特性以及易感性和磁化的能力。该系统的无循环低温特征可确保设备的成本效益和可靠的长期操作。该奖项反映了NSF的法定任务，并使用基金会的知识分子优点和更广泛的影响审查标准，被认为是珍贵的支持。