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.

这项主要的研究仪器赠款为获取用于表征磁性材料的振动样品磁力计（VSM）提供了资金。 VSM用于确定磁性磁滞曲线，即磁场和磁矩之间的关系。磁滞曲线在应用场下提供了材料的磁反应，通常称为磁指纹。 VSM允许平行和垂直于施加的磁场的磁矩测量。这种独特的仪器特征对于理解磁力矩和场是矢量数量，除大小的方向外，这对于理解磁力矩和场至关重要。该乐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的获取增强了5个不同计划的至少8个不同学术团体的研究。 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. VSM仪器将在德克萨斯州内加强教育和研究，该州是少数族裔服务机构，其中有大量人口的学生和来自人为人数不足的学生的学生。 VSM进一步发展了与区域初创公司的有意义的合作，得克萨斯州立大学的城市采矿公司建议获取高场矢量振动样品磁力计（VSM），以表征包括粉末，薄膜和块状磁性材料在内的磁性材料。该矢量VSM允许研究磁化强度和磁各向异性在较大的温度，磁场幅度和场方向范围内。快速温度和野外控制以及工具的简单性和鲁棒性使新VSM用作工作马磁性特征工具，并在德克萨斯州立大学的本科生和研究生课程中有效地实施它。 VSM的获取增强了5个不同计划的至少8个不同学术团体的研究。拟议的研究包括：RRAM过渡金属氧化物中的缺陷簇，低尺寸系统，特别是氢氧化物和氧还原氧化物的磁性特性的研究，这些磁氧化物和氧化氧化物正在应用于电池中的应用，这些材料，包括NDFEB永久磁铁，新型旋转设备，以及用于氧化型薄膜的作用，包括NDFEB永久磁铁的作用，薄膜的作用。新颖的传感器和应用以及用于元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