RUI: Magnetoelectric Effects in Multilayers of Magnetostrictive and Piezoelectric Perovskite Oxides

RUI：磁致伸缩和压电钙钛矿氧化物多层中的磁电效应

• 批准号: 0072144
• 负责人: Gopalan Srinivasan
• 金额: $ 19.2万
• 依托单位: Oakland University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-07-01 至 2003-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0072144&HistoricalAwards=false
• 关键词: RUI; Magnetoelectric; Effects; Multilayers; Magnetostrictive

This individual investigator award is to a professor at an undergraduate institution, Oakland University. The project is directed toward fabrication and analysis of multilayer magnetoelectric (ME) composites that are potential candidates for use as smart sensors, actuators, information storage media and high frequency signal processing devices. In composites consisting of magnetostrictive and piezoelectric phases, it is possible to accomplish magnetic field-to-electric field conversion with a two step process: magnetostriction (MS) induced mechanical deformation and piezoelectric (PE) effect induced electric fields. The work is motivated by theoretical predictions of a very large ME coefficient in multilayer composites of MS and PE phases, in part due to enhanced piezoelectric effects. Efforts will focus on composites consisting of alternate layers of the perovskite oxides: (i) ferromagnetic lanthanum manganites that are magnetostrictive and (ii) ferroelectric lead zirconate titanates that are piezoelectric. Thick film composites will be synthesized by doctor blade techniques and characterized in terms of their electrical, magnetic and ME properties. The proposed studies will to lead to an understanding of ME effects in multilayers. Undergraduate students in this project will acquire (i) knowledge in the theory of materials and (ii) training in preparation and characterization of magnetic and dielectric materials and will be well prepared for entry to graduate education or a career in industry. %%%This individual investigator award is to a professor at an undergraduate institution, Oakland University. It will support research into the preparation and characterization of a new class of materials that will facilitate the conversion of an electric field into a magnetic field or vice versa. Magnetoelectric (ME) composites consisting of alternate layers of lanthanum manganites that deform in a magnetic field and lead zirconate titanates that generate electricity when deformed will be studied. Thick film composites will be made and characterized in terms of their structural, magnetic, electrical and ME properties. The proposed studies are likely to lead to materials for smart sensors, signal processing, and memory devices. Undergraduate student participants will receive hands-on experience in the synthesis and characterization of materials of fundamental and technological importance, the skills that will allow them to be successful in graduate education or for employment in research and development positions in industry. ***

该个人调查员奖是授予奥克兰大学一家本科机构的教授。 该项目致力于制造和分析多层磁电（ME）复合材料，这些复合材料是用于智能传感器，执行器，信息存储媒体和高频信号处理设备的潜在候选者。在由磁刻录和压电阶段组成的复合材料中，可以通过两步过程来完成磁场到电场转换：磁刻录（MS）诱导的机械变形和压电（PE）效应诱导的电场。 这项工作是由MS和PE阶段多层复合材料中非常大的ME系数的理论预测激励的，部分原因是压电效应增强。努力将重点放在由钙钛矿氧化物的替代层组成的复合材料上：（i）具有磁性性的铁磁性灯笼型锰矿，以及（ii）铁皮含量的铁铅钛酸钛酸钛酸钛酸钛酸盐。厚膜复合材料将由医生刀片技术合成，并根据其电气，磁性和ME特性进行表征。 拟议的研究将导致对我对多层的影响的理解。 该项目的本科生将获得（i）材料理论的知识以及（ii）磁性和介电材料的准备和表征的培训，并为进入研究生教育或行业职业做好了充分的准备。 该个人调查员奖是授予奥克兰大学本科机构的教授。 它将支持对新型材料的制备和表征的研究，这些材料将有助于将电场转化为磁场，反之亦然。磁电（ME）复合材料由灯笼锰木岩组成的替代层在磁场中变形，并研究变形时会产生电能的铅锆石滴虫。将根据其结构，磁性，电气和ME的特性制作和表征厚的膜复合材料。 拟议的研究可能会导致智能传感器，信号处理和内存设备的材料。本科生的参与者将获得基本和技术重要性材料的综合和表征的动手经验，这些技能将使他们能够在研究生教育方面取得成功或在工业领域的研究和发展职位上就业。 ***