MRI: Acquisition of a Magneto Optic Kerr Effect (MOKE) Microscope for Research and Teaching

MRI：购买磁光克尔效应 (MOKE) 显微镜用于研究和教学

• 批准号: 2117646
• 负责人: Jayasimha Atulasimha
• 金额: $ 17.07万
• 依托单位: Virginia Commonwealth University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2117646&HistoricalAwards=false
• 关键词: MRI; Acquisition; Magneto; Optic; Kerr

Nontechnical Description:A magneto optic Kerr effect (MOKE) microscope is based on the principle that when light is reflected from a magnetic surface, the magnetization components of the surface affect the polarization or intensity of the reflected light. When integrated with a camera, one can visualize the in-plane and out-of-plane magnetization orientation in different regions of the sample. The Kerr effect is a powerful tool in understanding the magnetic behavior of bulk materials and thin films, studying exotic magnetic states, and characterizing small magnetic devices. Such magnetic devices have applications in computer memory, computing, communications, energy conversion, solid-state microcooling systems, etc. The acquisition of a MOKE microscope benefits several research groups at the Virginia Commonwealth University (VCU) and nearby universities, industries and laboratories and promotes further collaboration among them. In addition, it facilitates the training of undergraduates, graduate students, and postdoctoral fellows in cutting-edge interdisciplinary research and magnetism-related K-12 outreach activities, including summer research experience for K-12 students from under-represented groups. Technical Description:The room-temperature MOKE microscope purchased with this major research instrumentation (MRI) grant has high resolution imaging capability. It includes a white light source that allows for domain imaging under standard sensitivity conditions (polar, longitudinal and transverse MOKE) as well as blue- and red-light sources for materials that are more sensitive to these wavelengths and electromagnets for independent control of in-plane and out-of-plane magnetic fields over a large range (up to 1.3 T). The research benefited from this acquisition includes nanoscale magnetism, skyrmions, voltage control of magnetism, multiferroic piezoelectric-magnetostrictive composites, straintronic spin-wave nano-antennas amenable to miniaturization, topological insulators, chiral materials, non-collinear antiferromagnets, magnetoelectric, magnetocaloric, magnetic hyperthermia and magneto-optic properties. The applications of these research activities include energy-efficient nanomagnetic computing and communication, magnetocaloric cooling, and magnetic nanoparticle-based biomedical and catalysis.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.

非技术描述：磁电机光学kerr效应（moke）显微镜基于以下原理：当光从磁表面反射时，表面的磁化成分会影响反射光的极化或强度。与摄像机集成时，可以在样品的不同区域中可视化平面和平面磁化方向。 Kerr效应是理解大量材料和薄膜的磁性行为，研究外来磁性状态并表征小磁性设备的强大工具。此类磁性设备在计算机记忆，计算，通信，能源转换，固态微冷却系统等方面都有应用。摩克显微镜的获取使弗吉尼亚州英联邦大学（VCU）的多个研究小组以及附近的大学，工业和实验室和实验室有益，并在其中促进了进一步的合作。此外，它促进了在尖端的跨学科研究和与磁性相关的K-12外展活动中对本科生，研究生和博士后研究员的培训，包括来自代表性不足群体的K-12学生的夏季研究经验。技术描述：使用此主要研究仪器（MRI）赠款购买的室温摩克显微镜具有高分辨率成像能力。它包括一个白光来源，该白光源允许在标准灵敏度条件（极性，纵向和横向moke）以及对这些波长和电磁体更敏感的材料的蓝色和红光来源下进行域成像，以独立控制大型范围内的平面内和平面磁场（最高1.3 t）。 The research benefited from this acquisition includes nanoscale magnetism, skyrmions, voltage control of magnetism, multiferroic piezoelectric-magnetostrictive composites, straintronic spin-wave nano-antennas amenable to miniaturization, topological insulators, chiral materials, non-collinear antiferromagnets, magnetoelectric, magnetocaloric, magnetic高温和磁化特性。这些研究活动的应用包括节能纳米磁计算和通信，磁性冷却以及基于磁性纳米粒子的生物医学和催化。这项奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛的影响审查标准来通过评估来通过评估来获得支持的。