Facility Support: Institute for Rock Magnetism

设施支持：岩石磁学研究所

• 批准号: 2153786
• 负责人: Bruce Moskowitz
• 金额: $ 277.62万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-04-01 至 2027-03-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2153786&HistoricalAwards=false
• 关键词: Facility; Support; Institute; Rock; Magnetism

This Division of Earth Science Instrumentation and Facilities Program award will continue operational support for the Institute for Rock Magnetism (IRM) at the University of Minnesota for the next five years. The IRM is a multi-user facility for pure and applied research on the magnetic properties of rocks, sediments, and minerals. IRMS provides instrumental infrastructure, technical expertise, and educational outreach for the Earth Science community and related disciplines for research in Earth, planetary and environmental sciences. The IRM serves as a national facility for research into the physics and chemistry of magnetization in natural materials resulting from geologic, biologic, and anthropogenic processes in the Earth system and covering time scales from the present and recent past to billions of years ago. Natural-material magnetic research is an essential part of larger scientific efforts to understand the origin and evolution of the geomagnetic field and the deep interior of Earth and terrestrial planets; the history of tectonic plates; and the evolution of Earth’s surficial environments and climate. The five-year project will continue to strengthen opportunities for community-based research and promote the progress of science by: (1) maintaining the integrity, function, and accuracy of the facility instrumentation and computer resources, which maintains the IRM database; (2) providing access and support to over 150 visiting scientists from the US and abroad projected to use IRM facilities during the award period; (3) training and education of undergraduate, graduate students, and early career scientists; and (4) providing research-related information to the Earth science community and related disciplines through biennial conferences, website, online database, and a quarterly newsletter. The well-established biennial rock magnetism summer school provides a ten-day workshop for hands-on, lab-based, training for graduate and early career scientists.The magnetic behavior of particle assemblages of iron oxides, hydroxides, sulfides and iron alloys is governed by a combination of physical and chemical processes at the nanometric to micrometric levels which makes magnetic measurements sensitive indicators of mineral composition, crystallography, microstructures, and particle size, shape and orientation distributions. The magnetization that emerges from these processes and properties is affected by time, temperature, pressure, external magnetic fields, and (bio)geochemical surroundings. Understanding how these processes operate is the foundation for determining magnetic mineral compositions, concentrations and size distributions in natural samples, and for understanding the origin and significance of natural remanent records of ancient magnetic fields on Earth and other planetary bodies. A suite of advanced instruments enables sensitive measurements of magnetization under controlled conditions of temperature, magnetic fields, time, and orientation, and allow detailed characterization of magnetic mineralogy in geological, extraterrestrial, biological, and anthropogenic materials. Research facilitated by the analytical and technical capabilities of the IRM improves our understanding of how the complex natural recording systems work, and to maximize the information that we can recover from magnetic analysis of natural materials. Research activities are carried out by IRM scientists and students and visiting researchers, and encompass a range of aspects, from basic understanding of rock and mineral magnetism, to applied studies in which magnetic characteristics of rocks and sediments are used as tools for investigating a wide variety of geological and surficial Earth processes. The scale of investigations extends from bacterial magnetic particles and environmental reconstructions to plate tectonic reconstructions and magnetic mapping of other planets.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.

地球科学仪器和设施项目部门将在未来五年内继续为明尼苏达大学岩石磁学研究所 (IRM) 提供运营支持。IRM 是一个用于磁学纯研究和应用研究的多用户设施。 IRM 为地球科学界和地球、行星和环境科学研究的相关学科提供仪器基础设施、技术专业知识和教育推广。和化学地球系统中地质、生物和人为过程产生的天然材料的磁化强度，涵盖从现在和近代到数十亿年前的时间尺度，是了解自然材料的更大科学努力的重要组成部分。地磁场的起源和演化以及地球和类地行星的内部深处；构造板块的历史；以及地球表面环境和气候的演化，这个为期五年的项目将继续加强以社区为基础的机会。通过以下方式进行研究并促进科学进步：(1) 维护维护 IRM 数据库的设施仪器和计算机资源的完整性、功能和准确性；(2) 为来自美国和美国的 150 多名访问科学家提供访问和支持；国外计划在奖励期间使用 IRM 设施；(3) 对本科生、研究生和早期职业科学家进行培训和教育；(4) 通过每两年一次的会议、网站向地球科学界和相关学科提供研究相关信息； 、在线数据库和季刊完善的两年一度的岩石磁性暑期学校为研究生和早期职业科学家提供为期十天的基于实验室的实践培训研讨会。氧化铁、氢氧化物、硫化物和铁合金颗粒组合的磁性行为。受纳米到微米级别的物理和化学过程的组合控制，这使得磁性测量成为矿物成分、晶体学、微观结构以及颗粒尺寸、形状和方向分布的敏感指标。这些过程和特性受到时间、温度、压力、外部磁场和（生物）地球化学环境的影响。了解这些过程如何运作是确定天然样品中磁性矿物成分、浓度和尺寸分布以及理解的基础。地球和其他行星体上古代磁场的自然残留记录的起源和意义，一套先进的仪器可以在温度、磁场、时间和方向的受控条件下灵敏地测量磁化强度，并可以对磁性矿物学进行详细表征。在地理方面， IRM 的分析和技术能力促进了我们对复杂自然记录系统如何工作的理解，并最大限度地从天然材料的磁分析中恢复信息。由 IRM 科学家、学生和访问研究人员开展，涵盖了一系列方面，从对岩石和矿物磁性的基本了解，到将岩石和沉积物的磁性特征用作调查各种地质和矿物的工具的应用研究。地表过程。调查范围从细菌磁性粒子和环境重建到板块构造重建和其他行星的磁测绘。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Microbially Induced Anaerobic Oxidation of Magnetite to Maghemite in a Hydrocarbon‐Contaminated Aquifer

烃类污染含水层中微生物诱导磁铁矿厌氧氧化为磁赤铁矿

• DOI: 10.1029/2021jg006560
• 发表时间: 2022-04
• 期刊: Journal of Geophysical Research: Biogeosciences
• 作者: Ohenhen, Leonard O.;Feinberg, Joshua M.;Slater, Lee D.;Ntarlagiannis, Dimitrios;Cozzarelli, Isabelle M.;Rios‐Sanchez, Miriam;Isaacson, Carl W.;Stricker, Alexis;Atekwana, Estella A.
• 通讯作者: Atekwana, Estella A.

Effect of Magnetic Interactions on Magnetic Remanence in a Fine Particle System

细颗粒系统中磁相互作用对剩磁的影响

• DOI: 10.1109/tmag.2022.3177807
• 发表时间: 2022-08
• 期刊: IEEE Transactions on Magnetics
• 影响因子: 2.1
• 作者: Alaei, Sauviz P.;Dahlberg, E. Dan
• 通讯作者: Dahlberg, E. Dan

Vertically Integrated Nanowires on Si Wafers and Into Circuits

硅晶圆上垂直集成纳米线并集成到电路中

• DOI: 10.1109/tmag.2022.3218696
• 发表时间: 2023-03
• 期刊: IEEE Transactions on Magnetics
• 影响因子: 2.1
• 作者: Harpel, Allison;Um, Joseph;Dave, Aditya;Zhang, Yali;Mahjabeen, Nikita;Chen, Yicong;Henderson, Rashaunda;Franklin, Rhonda;Stadler, Bethanie J.
• 通讯作者: Stadler, Bethanie J.

Hard magnetic elastomers incorporating magnetic annealing and soft magnetic particulate for fused deposition modeling

结合磁退火和软磁颗粒的硬磁弹性体用于熔融沉积建模

• DOI: 10.1063/5.0119669
• 发表时间: 2022-11
• 期刊: AIP Advances
• 影响因子: 1.6
• 作者: Ziemann, Sarah J.;Fischer, Nathan A.;Lu, Jimmy;Lee, Thomas J.;Ennis, Michael;Höft, Thomas A.;Nelson
• 通讯作者: Nelson

Magnetic annealing of extruded thermoplastic magnetic elastomers for 3D-Printing via FDM

通过 FDM 进行 3D 打印的挤出热塑性磁性弹性体的磁性退火

• DOI: 10.1016/j.jmmm.2022.169266
• 发表时间: 2022-07
• 期刊: Journal of Magnetism and Magnetic Materials
• 影响因子: 2.7
• 作者: Fischer, Nathan A.;Robinson, Alex L.;Lee, Thomas J.;Calascione, Thomas M.;Koerner, Lucas;Nelson
• 通讯作者: Nelson