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：该项目的重点是提高对制造多功能设备的关键复合材料的理解。 具体来说，正在研究的材料是多铁性磁电（ME），同时具有磁性和铁电性。 通过紧密连接的压电和磁致伸缩的阶段，表现出ME耦合通过应变，它是可能的，人工创造的复合膜具有更好的应变传递能力的两相之间。在本项目结束时，将深入了解影响漏电流的科学参数（这会不利地降低ME耦合）。 此外，这种理解可以用于联合收割机组合其他铁电有序参数，例如铁电-铁弹或铁弹-磁性。在这个项目的过程中，不同的本科生和研究生正在接受培训和指导，结果正在被纳入一个新的物理和纳米材料课程，并通过在公共图书馆的演示提高对多功能器件材料的认识和理解。教授和她的团队正在合成新型磁电复合薄膜，其磁性相以纳米颗粒的形式分散，不同尺寸、纵横比和分布的纳米岛等形成压电相的基体，具有减小的衬底夹紧效应。该方法侧重于控制和表征界面扩散和反应（通过仔细选择材料，工艺参数和其他现象）。 人们正在深入了解应变状态是如何被调制的。 团队成员的招聘包括利用连接到一个历史悠久的黑人学院和大学，亚拉巴马A M大学。 贾恩教授正在将研究成果纳入新的研究生课程“高级功能纳米材料物理学”的开发中，她正在附近的托兰公共图书馆展示科学原理和方向。对于后者，正在进行评估，以评价在这种环境下外联的有效性。