Transition Metal Oxides with Correlated Electronic Properties: Synthesis and Characterization

该研究项目的重点是新化合物的设计和合成之间的密切相互作用，物理性质的详细表征和理解结构-性质关系。 该研究项目将为发现有趣的新材料提供基础，从而产生新的现象和有用的应用。过渡金属（B）钙钛矿的合成与表征（ABO 3; A =稀土、碱土、碱金属离子）、双钙钛矿（AA'BB' O 6）和相关的准低维（LD）Ruddlesden-Popper（RP）相[（AO）（ABO 3）n; n = 1，2，3]，和焦磷酸铝基（A2 B2 O 7）具有强相关电子相互作用的氧化物提供了发现具有感兴趣性质的新材料的机会。该研究项目是一个系统的研究独特的合成路线，用于稳定新的过渡金属钙钛矿，LD RP相和焦磷酸盐型化合物。 将尽可能尝试新的和有希望的相的晶体生长，并通过一系列物理测量来表征性能。该研究的一个主要重点是培养博士后，研究生和本科生在固态化学和材料科学的最先进的研究方法。具有重要电和磁性能的新型过渡金属氧化物的合成和表征强调在电子和通信工业中的应用，例如作为可能的计算机存储器芯片组件，传感器和成像设备中的超导元件。此外，这些研究的结果将增强对决定材料特性的因素的基本理解，这将使通过化学设计和控制新的独特材料成为可能。培养博士后，研究生和本科生在国家的最先进的研究方法在固态化学和材料科学将被强调。下一代训练有素的固体化学家和材料科学家是保持美国在21世纪世纪技术领先地位的必要条件。

The focus of this research project is a close interaction between the design and synthesis of new compounds, detailed characterization of the physical properties and understanding the structure-property relationships. This research project will provide the basis for discovering interesting new materials leading to novel phenomena and useful applications. The synthesis and characterization of transition metal (B) perovskites (ABO3; A = rare earth, alkali earth, alkali metal ions), double perovskites (AA'BB'O6) and related quasi-low-dimensional (LD) Ruddlesden-Popper (RP) phases [(AO)(ABO3)n; n = 1, 2, 3], and pyrochlore-based (A2B2O7) oxides with strongly correlated electronic interactions provide an opportunity to discover new materials with interesting properties. The research project is a systematic study of unique synthetic routes for the stabilization of new transition metal perovskites, LD RP phases and pyrochlore-type compounds. Crystal growth of new and promising phases whenever possible will be attempted and the characterization of properties by a battery of physical measurements will be carried out. A major focus of the research is the training of postdoctoral, graduate and undergraduate students in state-of-the-art reseach methods in solid state chemistry and materials science. The synthesis and characterization of novel transition metal oxides with important electrical and magnetic properties is emphasized for applications in the electronic and communication industries, for example as possible computer memory chip components, sensors, and superconducting elements in imaging devices. Moreover, the results of these investigations will enhance fundamental understanding of the factors that determine material properties, which will enable the design and control of new unique materials by chemistry. The training of Postdoctoral, graduate and undergraduate students in state-of-the-art reseach methods in solid state chemistry and materials science will be emphasized. The next generation of well-trained solid state chemists and materials scientists is essentail for maintaining the leadership of US technology in the 21st century.