Nanocomposite Magnetoelectric Films

纳米复合磁电薄膜

• 批准号: 1105975
• 负责人: Menka Jain
• 金额: $ 16.97万
• 依托单位: University of Connecticut
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-06-01 至 2014-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1105975&HistoricalAwards=false
• 关键词: Nanocomposite; Magnetoelectric; Films

NON-TECHNICAL DESCRIPTION: This project is focussed on improving the understanding of composite materials critical for making multifunctional devices. Specifically, the materials being studied are multiferroics magnetoelectrics (ME) that simultaneously have both magnetic and ferroelectric properties. By intimately connecting the piezoelectric and magnetostrictive phases that exhibit ME-coupling via strain, it is possible to artificially create composite films with better strain-transfer capabilities between the two-phases. At the conclusion of this project, insight will be gained into the scientific parameters affecting leakage current (that adversely reduces the ME coupling). Furthermore, this understanding may be used to combine other ferroics order parameters, such as, ferroelectric-ferroelastic or ferroelastic-magnetic. During the course of this project diverse undergraduate and graduate students are being trained and mentored, results are being incorporated into a new physics and nanomaterials course, and awareness and understanding of multifunctional device materials is being enhanced through presentations at public libraries.TECHNICAL DETAILS: The professor and her team are synthesizing novel magnetoelectric composite films with well-dispersed magnetic phase in the form of nanoparticles, nano-islands, etc. of different sizes, aspect ratio, and distribution, into a matrix of a piezoelectric phase with a reduced substrate-clamping effect. The approach focuses on controlling and characterizing interfacial diffusion and reactions (through careful selection of materials, processing parameters and other phenomena). Insight into how strain states can be modulated is being gained. Team member recruitment includes utilizing connections to a historically black college and university, Alabama A&M University. Professor Jain is incorporating results into the development of new graduate-level course entitled 'Physics of Advanced Functional Nano Materials' and she is presenting scientific principles and directions at the nearby Tolland Public Library. For the latter, assessment is underway to evaluate the effectiveness of the outreach in this environment.

非技术描述：该项目的重点是改善对制造多功能设备至关重要的复合材料的理解。 具体而言，所研究的材料是具有磁性和铁电特性同时的多效电磁电磁（ME）。 通过密切连接通过应变表现出me偶联的压电和磁性相位，可以在两个范围之间人工创建具有更好的应变转移能力的复合膜。在该项目的结论结束时，洞察力将获得影响泄漏电流的科学参数（这会不利地减少ME耦合）。 此外，这种理解可用于结合其他铁族阶参数，例如铁电 - 有弹性或铁弹性 - 磁性。在该项目的过程中，正在培训和指导多样化的本科生和研究生，将结果纳入新的物理和纳米材料课程中，并且通过公共图书馆的演示来增强对多功能设备材料的认识和理解。教授和她的团队正在以纳米颗粒，纳米岛等形式的磁性相位良好的磁相综合新型磁电复合膜，这些磁相具有不同的尺寸，纵横比和分布的形式，分为压电阶段的矩阵，并减少了基质 - 基质 - 基质 - 夹紧效果。该方法着重于控制和表征界面扩散和反应（通过仔细选择材料，加工参数和其他现象）。 洞悉如何调节应变状态。 团队成员招聘包括利用与历史悠久的黑人学院和阿拉巴马大学A＆M大学的联系。 Jain教授将结果纳入了新的研究生水平课程的题为“高级功能性纳米材料的物理学”，她正在附近的托兰德公共图书馆提出科学原理和指示。对于后者，正在进行评估以评估在这种环境中宣传的有效性。