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

这一个人调查员奖授予本科生机构奥克兰大学的一名教授。该项目旨在制造和分析多层磁电(ME)复合材料，这些复合材料有望用作智能传感器、执行器、信息存储介质和高频信号处理设备。在由磁致伸缩和压电相组成的复合材料中，可以通过磁致伸缩(MS)引起的机械变形和压电(PE)效应引起的电场两个步骤来实现磁场到电场的转换。这项工作的动机是理论预测在MS和PE相组成的多层复合材料中有非常大的ME系数，部分原因是增强的压电效应。工作将集中在由钙钛矿氧化物的交替层组成的复合材料上：(1)磁致伸缩的铁磁性镧锰氧化物和(2)压电型的铁电锆钛酸铅。厚膜复合材料将由博士刀片技术合成，并对其电学、磁学和磁学性能进行表征。建议的研究将导致对多层膜中的ME效应的理解。该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方面的培训，并为进入研究生教育或在工业中的职业生涯做好准备。这一个人调查员奖授予本科生机构奥克兰大学的一位教授。它将支持对一类新材料的制备和表征的研究，这种材料将有助于将电场转换为磁场或将磁场转换为电场。磁电(ME)复合材料将被研究，该复合材料由在磁场中变形的交替层的镧锰氧化物和变形时产生电能的锆钛酸铅组成。将制备厚膜复合材料，并对其结构、磁性、电学和ME性能进行表征。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。本科生学员将获得在合成和表征具有基础和技术重要性的材料方面的实践经验，这些技能将使他们在研究生教育中取得成功或在工业研究和开发职位上就业。***

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. ***