MRI: Development of Full Vector Vibrating Sample Magnetometry for Materials Research and Education

MRI：用于材料研究和教育的全矢量振动样品磁强计的开发

• 批准号: 2216440
• 负责人: Wilhelmus Geerts
• 金额: $ 12.14万
• 依托单位: Texas State University - San Marcos
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2216440&HistoricalAwards=false
• 关键词: MRI; Development; Full; Vector; Vibrating

This Major Research Instrumentation award provides funding for the development of triaxial vibrating sample magnetometry (VSM) to characterize anisotropic magnetic materials. A magnetometer is an instrument that allows one to characterize magnetic material, for example the magnets that stick to your refrigerator door. To fully characterize magnetic materials, it is necessary to measure all three components of the magnetic dipole moment vector. Triaxial VSMs however are not commercially available and less than a handful of research labs in Europe, Japan and Russia have attempted in the past to build a triaxial VSM. The instrument development allows for triaxial measurements to be done over a large temperature and field range. The vector coil sets that will be developed is extremely important for understanding the magnetic properties of anisotropic materials that have magnetic properties that vary with field direction. The new tools are expected to strengthen existing research and lead to new collaborations among academia and industry and will bring full vector magnetometry and torque capabilities to the Americas. Concrete plans are being developed to integrate the new tool in several graduate courses in Physics, MSEC, and Manufacturing Engineering each year and use the instrument for high school outreach activities and apprentice summer research programs in the College of Science and Engineering. The instrumentation development will be done by a graduate and undergraduate student. It is expected that the impact is much larger though once the tool is realized and tested with multiple graduate projects at Texas State and elsewhere benefiting from this unique capability. This instrument development award is to develop triaxial vibrating sample magnetometry (VSM) to measure all three components of the sample’s magnetic dipole moment simultaneously and allow for vector torque magnetometry as a function of temperature. Rather than designing a completely new instrument, the researcher will design and realize triaxial coil sets for two existing VSMs. The approach allows for a short runway, increases the adoptability of the new measurement tool benefitting from the existing user pool for both tools, and results in a large measurement parameter window (0-9 tesla, 2.8-1000 K). The method will be useful for the characterization of a wide range of materials. The project will directly enhance the research in 5 different academic programs (Physics, Chemistry, Manufacturing Engineering, Electrical Engineering, and MSEC). The realized vector torque magnetometer will enable researchers to study materials that have a complex magnetic anisotropy energy surface with multiple anisotropies originating from shape, strain, surface, step, flow, and a magnetic field applied during deposition. Such materials cannot be easily studied with a conventional torque magnetometer. Materials to be studied include oblique co-deposited NiFe films to be used in novel sensors and actuators, strained Fe doped epitaxial (InGa)2O3 films on anisotropic vicinal substrates, Nickel-Iron hydroxides and oxides that are currently being explored as electrode materials in lithium free batteries, and magnetic composites deposited by Magnetic Field Assisted Additive Manufacturing (MFAAM). MFAAM materials that are deposited by 2D (inkjet) or 3D (Fused Filament Fabrication) printing magnetic nanocomposites under applied magnetic field appear to have enhanced properties including a higher remanence, a larger susceptibility, and/or a stronger magnetic anisotropy. The coil sets and methods developed will be disseminated via the project’s website and peer-reviewed publications to allow other research groups to implement triaxial capability for their VSM.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.

这项重大研究仪器奖为开发三轴振动样品磁力计 (VSM) 提供资金，以表征各向异性磁性材料。磁力计是一种可以表征磁性材料的仪器，例如完全粘在冰箱门上的磁体。为了表征磁性材料，有必要测量磁偶极矩矢量的所有三个分量，但三轴 VSM 尚未商用，并且欧洲、日本和俄罗斯的少数研究实验室过去曾尝试构建三轴 VSM。 VSM 仪器的开发允许在较大的温度和磁场范围内进行三轴测量，这对于了解具有随磁场方向变化的各向异性材料的磁性非常重要。这些工具预计将加强现有研究，促进学术界和工业界之间的新合作，并将为美洲带来完整的矢量磁力测量和扭矩功能，目前正在制定具体计划，将该新工具整合到物理​​、MSEC 和制造领域的多个研究生课程中。每年工程和使用该仪器进行科学与工程学院的高中外展活动和学徒暑期研究项目。仪器开发将由研究生和本科生完成，但一旦该工具实现，其影响将会更大。在德克萨斯州立大学的多个研究生项目中进行了测试，并从这种独特的功能中受益于其他地方。该仪器开发奖是开发三轴振动样品磁力测定法（VSM），以同时测量样品磁偶极矩的所有三个分量，并允许矢量扭矩磁力测定法作为一种方法。温度的函数。与设计全新的仪器相比，研究人员将为两个现有的 VSM 设计并实现三轴线圈组。该方法可以缩短跑道，提高新测量工具的采用率，从而受益于这两种工具的现有用户库。一个大的测量参数窗口（0-9 特斯拉，2.8-1000 K），该方法将可用于表征各种材料。该项目将直接加强 5 个不同学术项目（物理、化学、制造工程、电气工程和 MSEC）实现的矢量扭矩磁力计将使研究人员能够研究具有复杂磁各向异性能量表面的材料，该表面具有源自形状、应变、表面、台阶、流动和施加的磁场的多个各向异性。使用传统的扭矩磁力计无法轻松研究此类材料，包括用于新型传感器和执行器的倾斜共沉积 NiFe 薄膜、应变 Fe 掺杂外延 (InGa)2O3 薄膜。各向异性邻位基底、目前正在探索作为无锂电池电极材料的镍铁氢氧化物和氧化物，以及通过 2D（喷墨）或 3D 沉积的磁场辅助增材制造 (MFAAM) 材料沉积的磁性复合材料。 （熔丝制造）在施加磁场下打印磁性纳米复合材料似乎具有增强的性能，包括更高的剩磁、更大的磁化率和/或更强的磁各向异性。开发的线圈组和方法将通过该项目的网站和同行评审的出版物进行传播，以允许其他研究小组为其 VSM 实施三轴能力。该奖项授予 NSF 的法定使命，并已被授予。通过使用基金会的智力优点和更广泛的影响审查标准进行评估，认为值得支持。