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. ***

这个个人研究奖是给一个本科院校，奥克兰大学的教授。 该项目旨在制造和分析多层磁电（ME）复合材料，这些复合材料是用作智能传感器，致动器，信息存储介质和高频信号处理设备的潜在候选者。在由磁致伸缩相和压电相组成的复合材料中，可以通过两步过程实现磁场到电场的转换：磁致伸缩（MS）引起的机械变形和压电（PE）效应引起的电场。 这项工作的动机是一个非常大的ME系数在MS和PE相的多层复合材料的理论预测，部分原因是由于增强的压电效应。努力将集中在由钙钛矿氧化物的交替层组成的复合材料上：（i）磁致伸缩的铁磁镧锰氧化物和（ii）压电的铁电锆钛酸铅。厚膜复合材料将通过刮刀技术合成，并根据其电、磁和ME性能对其进行表征。 建议的研究将导致在多层膜中的ME效应的理解。 本项目的本科生将获得（i）材料理论知识和（ii）磁性和介电材料的制备和表征培训，并为进入研究生教育或工业职业做好充分准备。 %这个个人研究者奖是给奥克兰大学一所本科院校的教授的。 它将支持对一类新材料的制备和表征的研究，这类材料将促进电场与磁场的相互转换。将研究由在磁场中变形的镧锰氧化物和变形时产生电力的锆钛酸铅交替层组成的磁电（ME）复合材料。厚膜复合材料将在其结构，磁，电和ME性能方面的特点。 拟议中的研究可能会导致智能传感器，信号处理和存储设备的材料。本科生参与者将获得基础和技术重要性材料的合成和表征方面的实践经验，这些技能将使他们能够在研究生教育中取得成功或在工业中的研发职位上就业。***