New Pathways to Strongly Correlated and Multi-Functional Transition Metal Perovskites: Phase Stability and Properties by Design

该项目的重点是具有原子组织局部结构的强相关过渡金属钙钛矿的材料研究。通过设计合成的具有降低的结构扭曲和亚纳米层状异质结构的新型化合物以及伴随的性质测量将为理解确定稳定性和物理行为的相互作用的竞争作用提供基础。这项工作的目的是开发新的合成工具和新的测量技术，以确定钙钛矿的结构和物理特性，表现出几个竞争的特点。这些属性的几何参数和基本相互作用的追求进一步的理论见解方面的描述将提供高度准确的数据。该项目还将为培养本科生和研究生、博士后研究人员和访问者提供一个独特的机会，让他们参与先进氧化物的固态化学和物理学的广泛领域的前沿研究。该项目通过系统探索化学成分，温度和氧含量对结构和物理性能的影响，对复杂氧化物化合物的材料研究进行了研究。通过设计合成的具有降低的结构扭曲和原子有序的局部排列的新型化合物与伴随的性质测量将为理解确定稳定性和物理行为的相互作用的竞争作用提供基础。这项工作将开发新的合成工具和测量技术的材料表现出几个共存的特性，并提供高度准确的数据，发展的理论见解方面的基本相互作用。该项目的影响来自于它将促进对原子尺度上物质的组织和控制的更多理解，这将导致钙钛矿在全氧化物多功能磁/电介质/电子设备中的未来应用。该项目还将提供一个独特的机会，通过参与先进氧化物的固态化学和物理学广泛领域的前沿研究，培训本科生和研究生，博士后研究人员和访问者。

The project centers on materials research of strongly correlated transition metal perovskites with atomically organized local structures. Novel compounds with decreased structural distortions and sub-nanometer layered heterostructures synthesized by design with concomitant properties measurements will provide the basis for understanding the competing roles of interactions which determine stability and physical behavior. This work aims to develop new synthesis tools and new measurement techniques to determine the structural and physical properties of perovskites exhibiting several competing characteristics. Highly accurate data for description of these properties in terms of geometrical parameters and fundamental interactions for pursuit of further theoretical insights will be provided. This project will also provide a unique opportunity for training undergraduate and graduate students, postdoctoral researchers, and visitors by involving them in cutting-edge research on a wide area of solid state chemistry and physics of advanced oxides.%%%The project centers on materials research of complex oxide compounds by using systematic exploration of the effects of chemical composition, temperature, and oxygen content on structural and physical properties. Novel compounds with decreased structural distortions and atomically ordered local arrangements synthesized by design with concomitant properties measurements will provide a basis for understanding the competing roles of interactions which determine stability and physical behavior. This work will develop new synthesis tools and measurement techniques for materials exhibiting several coexisting characteristics, and provide highly accurate data for development of theoretical insights in terms fundamental interactions. The project's impact derives from the increased understanding it will promote on the organization and control of matter at the atomic scale that will lead to future application of perovskites in all-oxide multifunctional magnetic/dielectric/electronic devices. This project will provide also a unique opportunity for training undergraduate and graduate students, postdoctoral researchers, and visitors by involvement in cutting-edge research on a wide area of solid state chemistry and physics of advanced oxides.