Giant Magnetoelectric Effects in Ferromagnetic-Ferroelectric Heterostructures

该个人研究者奖将支持一个项目，该项目旨在制造和分析由铁氧体和锆钛酸铅组成的新型大块和多层磁电（ME）复合材料。 复合材料中的电磁耦合由机械应力介导。研究的重点将是巨型ME相互作用的起源。 研究将涉及以下任务。 (i)用传统烧结、热压和微波烧结合成块体、双层和多层膜。 其目的是获得复合材料的结构和力学参数在界面处的变化很大。 (ii)低频巨电磁效应的测量、理论分析和界面耦合的估算。 (iii)铁氧体在铁磁共振（9-10 GHz）下微波ME效应的研究。计划中的研究具有根本性和技术重要性。 预期的影响包括研究生、本科生和高中生的研究经验，以及与欧洲科学家和工业界的合作（德尔菲公司）。 这种层状材料是磁电存储器件、智能传感器和执行器的潜在候选材料。 此外，还可能开发新的电控微波磁信号处理设备和磁控压电设备。该个人研究者奖支持一个研究项目，涉及能够将磁场转换为电场的材料的制备和分析。 感兴趣的材料是由响应磁场的铁氧体和响应电场的锆钛酸铅组成的复合材料。 铁氧体在磁场中变形，而这种变形又在钛酸盐中产生电。 将制备散装样品和分层样品。 包括微波加热在内的各种加工技术将用于制备具有最佳场转换效率的样品。 将在宽频率范围内研究样品特性。 研究的预期影响包括以下几点。 (i)为研究生、本科生和高中生提供实践研究经验。 (ii)与欧洲科学家就研究的理论方面进行合作。 (iii)用于通信和国防相关系统的多功能智能传感器和换能器的新材料。 (iv)与德尔菲汽车系统公司合作，将复合材料应用于汽车行业。

This individual investigator award will support a project directed toward fabrication and analysis of novel bulk and multilayer magnetoelectric (ME) composites consisting of ferrites and lead zirconate titanate. The electromagnetic coupling in the composites is mediated by mechanical stress. The focus of the research will be on the origin of giant ME interactions. The research will involve the following tasks. (i) Synthesis of bulk, bilayers and multilayers by traditional sintering, hot pressing and microwave sintering. The objective is to obtain composites with wide variations in of structural and mechanical parameters at the interface. (ii) Measurements of low frequency giant ME effects, theoretical analysis, and estimation of interface coupling. (iii) Studies on microwave ME effects, at ferromagnetic resonance (9-10 GHz) for ferrites. The planned studies are of fundamental and technological importance. Anticipated impacts include research experience for graduate, undergraduate, and high school students and collaboration with European scientists and industry (Delphi Corporation). The layered materials are potential candidates for use as magnetoelectric memory devices, smart sensors and actuators. There are also possibilities for a new class of electrically controlled microwave magnetic signal processing devices and magnetically controlled piezoelectric devices.This individual investigator award supports a research project involving the preparation and analysis of materials that are capable of converting magnetic fields to electric fields. Materials of interest are composites consisting of ferrites that respond to magnetic fields and lead zirconate titanate that respond to electric fields. The ferrite deforms in a magnetic field and the deformation in turn produces electricity in the titanate. Both bulk and layered samples will be prepared. A variety of processing techniques, including microwave heating, will be used to prepare samples with the best field conversion efficiency. Sample properties will be studied over a wide frequency range. Anticipated impacts of the research include the following. (i) Hands-on research experience for graduate, undergraduate and high school students. (ii) Collaboration with European scientists on theoretical aspects of the research. (iii) New materials for use as multifunctional smart sensors and transducers in communication and defense related systems. (iv) Collaboration with Delphi Automotive Systems on the use of the composites for applications in automotive industry.