Nonlinear Optical Probing of Ferroic and Multiferroic Domain Dynamics

铁性和多铁性域动力学的非线性光学探测

• 批准号: 0512165
• 负责人: Venkatraman Gopalan
• 金额: $ 23.5万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-09-01 至 2009-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0512165&HistoricalAwards=false
• 关键词: Nonlinear; Optical; Probing; Ferroic; Multiferroic

Technical. Intellectual Merit: The focus of this project is to advance fundamental understanding of complex domain microstructures and their dynamics under diverse conditions such as temperature, electric, magnetic fields, and strain. The project deals with two new areas, coupled ferroelectric-magnetic phenomena in multiferroic materials, and large strain enhancements in ferroic and multiferroic material properties. The approach combines amplitude, phase, polarization, spectroscopy and imaging in second and third order nonlinear optical measurements to study strained ferroics and multiferroics. The aim is to understand domain structure, electrical-magnetic domain coupling and dynamics, and phase transitions. Also, simultaneous in-situ dielectric and magneto-dielectric measurements will be performed to correlate electrical, magnetic and optical responses from multiferroics for understanding coupled magnetic-ferroelectric phenomena. Collaborations on first principles theory, phenomenological modeling, film synthesis, crystal growth, x-ray and electron microscopy characterization, and magnetic measurements are integral to the project. Nontechnical.Broader Impact: The project addresses fundamental materials research with strong technological relevance to electronics and photonics, and effectively integrates research and education. The project facilitates interdisciplinary education of students in collaborative interactions. Graduate and undergraduate students will participate in the project allowing them to gain hands-on experience in forefront research. The PI will capitalize on Penn State-Women in Science & Engineering (WISE) Week, and SROP (Summer Research Opportunity Program for minority students) -for continuing a workshop on "The Science and Technology of Light" for high school girls and underrepresented groups annually.

技术的。智力优点：该项目的重点是在温度，电场，磁场和应变等各种条件下促进对复杂域微结构及其动态的基本理解。该项目涉及两个新区域：多效材料中的铁电磁现象耦合，并在铁族和多效材料特性中增强了较大的应变增强。该方法将幅度，相位，极化，光谱和成像结合在第二和三阶非线性光学测量中，以研究紧张的铁族和多表面。目的是了解域结构，电磁域耦合和动力学以及相变。同样，将执行同时进行原位介电和磁性测量值，以将来自多效率的电气，磁和光学响应相关联，以理解耦合的磁性效率现象。关于第一原理理论，现象学建模，薄膜合成，晶体生长，X射线和电子显微镜表征以及磁性测量的合作是该项目不可或缺的。非技术性影响力的影响：该项目与电子和光子学的强烈技术相关的基本材料研究探讨了基本材料研究，并有效地整合了研究和教育。该项目促进了在协作互动中对学生的跨学科教育。研究生和本科生将参加该项目，使他们能够在前列研究中获得动手经验。 PI将利用科学与工程周的宾夕法尼亚州妇女（WISE）和SROP（针对少数民族学生的夏季研究机会计划），以每年为高中女生的“科学和光线技术”讲习班，每年都有代表性的群体。