GOALI: Nanoscale Characterization and Manipulation of Magnetoelastic Coupling and Magnetic Domains by Novel Quantitative Scanning Probe Microscopy

GOALI：通过新型定量扫描探针显微镜对磁弹性耦合和磁域进行纳米级表征和操纵

• 批准号: 1006194
• 负责人: Jiangyu Li
• 金额: $ 31.5万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-08-15 至 2014-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1006194&HistoricalAwards=false
• 关键词: GOALI; Nanoscale; Characterization; Manipulation; Magnetoelastic

TECHNICAL SUMMARY: The objective of this project is to understand the dramatically enhanced magnetostriction in Galfenol, or Fe-Ga alloy, which exhibits magnetostrictive strain one order of magnitude higher than that of alpha-Fe, even though Ga is nonmagnetic. Novel piezomagnetic force microscopy (PmFM) will be developed through the collaboration between the University of Washington and Asylum Research, which will enable quantitative characterization and manipulation of magnetoelastic coupling and magnetic domains with high sensitivity, high spatial resolution, and minimized cross-talk with topography. Magnetostrictive response and magnetic domains of Galfenol will be mapped and manipulated at the nanoscale using the proposed PmFM technique, and the obtained real space magnetoelastic response will be correlated with the underlying microstructure of Galfenol determined from detailed structural analysis. Modeling and simulation of the configuration and evolution of magnetic domains and transforming microstructures of Galfenol will also be carried out to link the nanoscale magnetostrictive response and macroscopic magnetostriction measurement. Through the tightly coupled experimental and theoretical investigations, the project will help to clarify the microscopic mechanism responsible for the enhanced magnetostriction in Galfenol.NON-TECHNICAL SUMMARY: Magnetostriction refers to magnetic field induced strain in ferromagnetic materials, and Galfenol is an emerging class of structural magnetostrictive material with excellent mechanical properties. It is promising for a wide range of applications in mechanically tough environments, such as underwater sonar transduction and damping or energy harvesting of mechanical vibrations, in which conventional giant magnetostrictive materials are not suitable because of their poor mechanical strength. The project will help to understand the microscopic mechanism responsible for the enhanced magnetostriction in Galfenol, and potentially guide the development of new structural magnetostrictive materials with even better properties. A novel scanning probe microscopy technique will also be developed, which can be applied to study a wide range of magnetic materials with enhanced sensitivity and resolution over the state of art magnetic force microscopy. Graduate and undergraduate students will be trained through integrated research and education that involve extensive collaborations with industry, and outreach activities will also be developed for high school students and teachers.

技术摘要：该项目的目的是了解Galfenol或Fe-GA合金中的磁曲折的大幅增强，即使GA是非磁性的，它们也表现出比Alpha-FE高的磁性菌株一个数量级。新型的压电力显微镜（PMFM）将通过华盛顿大学和庇护研究之间的合作开发，该研究将实现磁弹性耦合的定量表征和操纵，并具有高灵敏度，高空间分辨率，高空间分辨率，以及与置于平台的交叉交叉对话。使用拟议的PMFM技术将在纳米级上绘制并操纵磁酚的磁静脉反应和磁性域，并且获得的实际空间磁弹性响应将与从详细结构分析确定的Galfenol的基础微观结构相关。还将进行磁性域的构型和演化以及伽那体的微观结构的建模和模拟，以将纳米级磁曲片响应和宏观磁通术测量链接起来。通过紧密耦合的实验和理论研究，该项目将有助于阐明负责增强加利诺酚的磁通术的微观机制。NON-TECHNICAL摘要：磁通状学指的是磁场引起的磁场诱导的富特磁性材料的应变，而Galfenol是结构性大型材料的新型属性。对于机械韧性的环境中的广泛应用，例如水下声纳转导和阻尼或能量收集机械振动，这是有希望的，其中传统的巨型磁性材料不合适，因为它们的机械强度差。该项目将有助于理解负责增强加氟酚磁性增强的显微镜机制，并有可能指导具有更好性能的新结构磁刻板材料的开发。还将开发出一种新型的扫描探针显微镜技术，该技术可用于研究具有磁性磁力显微镜状态的敏感性和分辨率增强的广泛磁性材料。研究生和本科生将通过综合研究和教育进行培训，这些研究和教育涉及与行业的广泛合作，并且还将为高中生和老师开发外展活动。