MRI: Acquisition of a Physical Property Measurement System for Materials Science Research and Education

MRI：获取用于材料科学研究和教育的物理性能测量系统

• 批准号: 0922997
• 负责人: John Philip
• 金额: $ 40.12万
• 依托单位: Catholic University of America
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-10-01 至 2011-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0922997&HistoricalAwards=false
• 关键词: MRI; Acquisition; Physical; Property; Measurement

0922997PhilipCatholic U.Technical AbstractThe Catholic University of America (CUA) will acquire a new Physical property measurement system (PPMS) with AC magnetometry and vibrating sample magnetometer options to be shared with researchers at Howard University and Virginia Commonwealth University. The PPMS will be able to measure a variety of physical properties, over a range of temperatures from 2.0 - 400 K, and with magnetic fields up to 7 Tesla. The EverCool dewar completely avoids the need for liquid He transfers and to minimize helium loss from the PPMS under most operating conditions. There is automatic control of the He gas input to replenish what is lost over time and to automatically maintain optimal liquid helium levels in the dewar. The instrument provides for measurement of the magnetic moment, AC susceptibility, electrical transport, magnetoresistance and Hall effect. The acquisition of this instrument will enable: the investigation of spin injection and detection in semiconducting channels such as Si and Ge as well as the effects of interfaces on efficient spin transfer into these channels; the investigation of the large spin-dependent transport properties observed in Si-based nanowires; the study of ferromagnetic nanowires composed of FeGa for a wide range of defense and industrial applications as transducers and sensors; understanding the fundamental physics of the magnetite at the nanoscale; characterizing new spin crossover complexes that are of great interest as molecular memory devices or switches; and the development of ferromagnetic bioceramics for new bioimplants especially for bone and also for treating various diseases and delivering drugs. The acquisition of this instrument will greatly enhance our present capabilities and add a new dimension to materials research at CUA. It will also have an impact on the new initiatives in nano-biomaterials and in materials science. This new facility will bring together researchers from different areas, leading to an exchange of ideas and new joint research projects and will serve as a catalyst for further expansion in CUA?s science and engineering programs and greater collaboration with Universities in and around the District of Columbia.Non-technical AbstractThe advancement and understanding of materials properties are critical for developing novel next generation electronic, magnetic and spin electronic devices. The medical field also now depends greatly on innovative and nanoscale materials and devices for bioimplants, drug delivery and newer treatment options. Researchers at the Catholic University of America are actively involved in investigating the electronic and magneto-transport properties of nanoscale devices, nanoparticles, biomaterials and inorganic complexes. The acquisition of a Physical Property Measurement System with AC magnetometry and Vibrating Sample Magnetometer options will allow multiple users within the science and engineering departments to have access to electrical, magnetic and magneto-transport measurements of materials and devices. Understanding the material and the nanoscale device properties are crucial for advanced technologies that will drive our future economy. This instrument is an essential tool used to study, characterize and evaluate materials with a wide range of properties. It will be used to guide the scientists at the Catholic University in their efforts to design new nanoscale devices that will employ electron spin states to store and process information, which will pave a foundation for a dramatic improvement in computing and a new generation of low power consuming, highly dense and fast electronic circuits. Also understanding the fundamental physics at the nanoscale of certain magnetic materials (oxides of iron) are vital for new technological advances in the biomedical industry especially for bioimplants and drug delivery. It will also help researchers to investigate new materials called spin crossover complexes, which are of great interest as molecular memory devices or switches and when fully understood could lead to significant advances in the miniaturization of electronic and computer components. This instrument will provide the foundation for collaborative efforts among greater Washington area universities such as Catholic, Howard and Virginia Commonwealth University. It will be also used to train future generations of scientists through undergraduate, graduate and postdoctoral research. The new capability will also help to expand our efforts in training minority and under-represented high school students from DC metro area.

0922997 PhilipCatholic U.技术摘要美国天主教大学（CUA）将获得一个新的物理性质测量系统（PPMS），该系统具有交流磁力仪和振动样品磁力仪选项，将与霍华德大学和弗吉尼亚联邦大学的研究人员共享。PPMS将能够在2.0 - 400 K的温度范围内测量各种物理特性，磁场高达7特斯拉。EverCool杜瓦瓶完全避免了液态氦的传输，并在大多数操作条件下将PPMS的氦损失降至最低。氦气输入有自动控制，以补充随着时间的推移而损失的氦气，并自动保持杜瓦瓶中的最佳液氦水平。该仪器可测量磁矩、交流磁化率、电输运、磁阻和霍尔效应。获得这台仪器将能够：研究半导体沟道（如Si和Ge）中的自旋注入和检测，以及界面对有效自旋转移到这些沟道中的影响;研究在Si基纳米线中观察到的大自旋相关输运性质;研究由FeGa组成的铁磁纳米线，用于广泛的国防和工业应用，如传感器和传感器;了解纳米级磁铁矿的基本物理学;表征作为分子记忆装置或开关的新的自旋交叉复合物;以及开发用于新的生物植入物的铁磁生物陶瓷，特别是用于骨，也用于治疗各种疾病和输送药物。这台仪器的收购将大大提高我们目前的能力，并增加了一个新的层面，材料研究在CUA。它还将对纳米生物材料和材料科学的新举措产生影响。这个新的设施将汇集来自不同领域的研究人员，导致思想交流和新的联合研究项目，并将作为进一步扩大CUA的催化剂。的科学和工程计划，并与大学和周围的哥伦比亚特区更大的合作。非技术摘要材料性能的进步和理解是开发新的下一代电子，磁性和自旋电子器件的关键。医疗领域现在也在很大程度上依赖于用于生物植入物、药物输送和更新治疗选择的创新和纳米级材料和设备。美国天主教大学的研究人员积极参与研究纳米器件、纳米颗粒、生物材料和无机复合物的电子和磁传输特性。购置具有交流磁力测量和振动样品磁力计选项的物理特性测量系统将使科学和工程部门内的多个用户能够获得材料和设备的电、磁和磁输运测量。了解材料和纳米器件特性对于推动我们未来经济的先进技术至关重要。该仪器是用于研究、表征和评估具有广泛特性的材料的重要工具。它将用于指导天主教大学的科学家们设计新的纳米级器件，这些器件将采用电子自旋状态来存储和处理信息，这将为计算和新一代低功耗，高密度和快速电子电路的显着改进奠定基础。此外，了解某些磁性材料（铁氧化物）纳米级的基本物理学对于生物医学行业的新技术进步至关重要，特别是对于生物植入物和药物输送。它还将帮助研究人员研究称为自旋交叉复合物的新材料，这些材料作为分子存储器件或开关具有很大的兴趣，并且在充分理解时可能导致电子和计算机组件小型化的重大进展。这一工具将为更大的华盛顿地区的大学，如天主教大学、霍华德大学和弗吉尼亚联邦大学之间的合作努力奠定基础。 它还将用于通过本科生、研究生和博士后研究培养未来的科学家。新的能力也将有助于扩大我们在培训少数民族和代表性不足的高中学生从DC市区的努力。