MRI: Acquisition of Vibrating Sample Magnetometer for Materials Research and Education

MRI：购买振动样品磁力计用于材料研究和教育

• 批准号: 1726970
• 负责人: Wilhelmus Geerts
• 金额: $ 22.53万
• 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: 2017
• 资助国家: 美国
• 起止时间: 2017-09-15 至 2021-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1726970&HistoricalAwards=false
• 关键词: MRI; Acquisition; Vibrating; Sample; Magnetometer

This Major Research Instrumentation grant provides funding for the acquisition of a vibrating sample magnetometer (VSM) used for the characterization of magnetic materials. A VSM is used to determine the magnetic hysteresis curve, i.e. the relation between the magnetic field and the magnetic moment. The hysteresis curve provides the magnetic response of the material under an applied field and is often referred to as the magnetic fingerprint. The VSM allows the measurements of the magnetic moment both parallel and perpendicular to the applied magnetic field. This unique instrumental feature is crucial to the understanding of magnetic properties as magnetic moment and field are vector quantities that have in addition to a magnitude also a direction. The instrument is used to study thin film and powder materials that are currently being investigated at Texas State University. The VSM acquisition enhances the research in at least 8 different academic groups across 5 different programs. Research projects impacted by the new VSM include studies of (1) new permanent magnetic materials to be applied in wind turbines and generators, (2) two-dimensional (2D) materials for electrochemical energy storage, (3) nanocomposite materials with superior mechanical properties, and (4) novel metal oxide thin films for applications in sensors, actuators, and new non-volatile memory devices. The VSM instrument will enhance education and research within Texas State which is a Minority-serving Institution with a significant population of 1st generation students and students from underrepresented groups. The VSM further enable development of a meaningful collaboration with a regional start-up company, Urban Mining Texas State University proposes to acquire a high field vector vibrating sample magnetometer (VSM) for the characterization of magnetic materials including powders, thin films and bulk magnetic materials. This vector VSM allows the study of the magnetization and magnetic anisotropy over a wide temperature, field magnitude, and field direction range. The fast temperature and field control and the simplicity and robustness of tool enables the use of the new VSM as a work-horse magnetic characterization tool and effectively implement it in Texas State University undergraduate and graduate curriculum. The VSM acquisition enhances the research in at least 8 different academic groups across 5 different programs. Proposed research includes studies of the magnetic properties of: defect clusters in RRAM transition metal oxides, low dimensional systems, specifically hydroxides and oxyhydroxides that are being studied for applications in batteries, hard magnetic materials including NdFeB permanent magnets, novel spintronic devices and the role of oxygen vacancies, thin ferromagnetic films grown by MBE, RF sputtered BFO films for application in novel sensors and applications, and printed magnetic thin films for use in meta-materials.

这项主要研究仪器拨款为购买用于表征磁性材料的振动样品磁力计 (VSM) 提供资金。 VSM 用于确定磁滞曲线，即磁场与磁矩之间的关系。磁滞曲线提供了材料在外加磁场下的磁响应，通常称为磁指纹。 VSM 允许测量平行于和垂直于所施加磁场的磁矩。这种独特的仪器特征对于理解磁特性至关重要，因为磁矩和磁场是矢量，除了大小之外还具有方向。该仪器用于研究德克萨斯州立大学目前正在研究的薄膜和粉末材料。 VSM 的收购增强了 5 个不同项目中至少 8 个不同学术团体的研究。受新VSM影响的研究项目包括(1)应用于风力涡轮机和发电机的新型永磁材料、(2)用于电化学储能的二维(2D)材料、(3)具有优异机械性能的纳米复合材料的研究，（4）新型金属氧化物薄膜，用于传感器、执行器和新型非易失性存储器件。 VSM 工具将加强德克萨斯州内的教育和研究，该州是一个为少数族裔服务的机构，拥有大量第一代学生和来自代表性不足群体的学生。 VSM 进一步促进了与区域初创公司 Urban Mining 德克萨斯州立大学开展有意义的合作，该公司提议购买一台高场矢量振动样品磁力计 (VSM)，用于表征磁性材料，包括粉末、薄膜和块状磁性材料。该矢量 VSM 允许研究宽温度、磁场强度和磁场方向范围内的磁化强度和磁各向异性。快速的温度和磁场控制以及工具的简单性和稳健性使得新的 VSM 能够用作主力磁表征工具，并在德克萨斯州立大学本科生和研究生课程中有效实施。 VSM 的收购增强了 5 个不同项目中至少 8 个不同学术团体的研究。拟议的研究包括以下方面的磁性研究：RRAM 过渡金属氧化物中的缺陷簇、低维系统，特别是正在研究用于电池的氢氧化物和羟基氧化物、包括 NdFeB 永磁体在内的硬磁材料、新型自旋电子器件以及氧空位、MBE 生长的铁磁薄膜、用于新型传感器和应用的射频溅射 BFO 薄膜以及用于超材料的印刷磁性薄膜。

项目成果

Magnetic Properties of Reactive Co-Sputtered NiFe-Oxide Samples

反应性共溅射 NiFe 氧化物样品的磁性

• DOI: 10.1109/tmag.2018.2866788
• 发表时间: 2019
• 期刊: IEEE Transactions on Magnetics
• 影响因子: 2.1
• 作者: Binod, D. C.;Oliva, Andres A.;Ayala, Anival;Acharya, Shankar;Twagirayezu, Fidele;Talbert, James Nick;Scolfaro, Luisa M.;Geerts, Wilhelmus J.
• 通讯作者: Geerts, Wilhelmus J.

Time dependence of magnetic moment of strontium-ferrite powder measured with a biaxial vibrating sample magnetometer (VSM)

使用双轴振动样品磁力计 (VSM) 测量锶铁氧体粉末磁矩的时间依赖性

• DOI: 10.1063/9.0000216
• 发表时间: 2021
• 期刊: AIP Advances
• 影响因子: 1.6
• 作者: Ahmed, Tanjina Nasreen;Belduque, Maria Camila;Binod, D. C.;Tate, Jitendra S.;Geerts, Wilhelmus J.
• 通讯作者: Geerts, Wilhelmus J.

Theoretical and experimental study of (Ga1-xFex)2O3 ternary alloys

• DOI: 10.1016/j.jcrysgro.2021.126353
• 发表时间: 2021-09
• 期刊: Journal of Crystal Growth
• 影响因子: 1.8
• 作者: Md Dalim Mia;B. C. Samuels;Md. Abdul Ahad Talukder;P. Borges;L. Scolfaro;W. Geerts;R. Droopad