Materials World Network: Design, Synthesis and Characterization of New Multiferroic Perovskites

材料世界网络奖授予俄亥俄州立大学，以表彰对新的过渡金属氧化物和伪氧化物钙钛矿进行建模、合成和表征的合作研究，这些氧化物和伪氧化物表现出多铁性和/或显著的磁电耦合。该奖项由NSF国际科学与工程办公室的固态化学计划和欧洲和欧亚计划共同资助。多铁性材料表现出铁、铁或反铁磁有序与铁电有序共存。多铁性材料的大部分(如果不是全部)潜在应用都是基于对磁电效应的利用，即电极化和磁极化是耦合的。这种罕见的耦合，如果能够被利用，将使存储、传输和处理电子信息的全新方式成为可能，包括磁性记录的铁电存储器、固定雷达阵列和射频通信。该项目将包括几项相互关联的研究任务，涉及复杂的混合金属氧化物，可显示磁有序和电有序，高质量单相材料的合成，使用可变温度、高分辨率实验室和同步加速器粉末X射线衍射、中子粉末衍射和透射电子显微镜技术相结合的完整结构表征。这些工作将与磁性和电学性质的测量以及两者之间的耦合相结合，并由使用从键价优化算法到自旋相关密度泛函能带结构计算工具的计算建模来指导。发现新的磁电材料和探索上述体系的组成、结构和性质关系可以被认为是该项目的主要可能成果。来自俄亥俄州立大学(合成、基本表征、计算)、莫斯科州立大学(高级透射电子显微镜)和悉尼大学(中子、X射线光谱学)的研究人员参与了这项合作研究，每个地点的科学家贡献了互补的优势。这笔赠款将支持三所机构之间的学生和教师交流，还将提供获得最先进的中子衍射设施和高压高温合成能力的机会。该奖项将支持研究活动，并汇集多个领域的研究基础设施和专业知识，包括钙钛矿的计算建模、高压高温合成和电子显微镜以及变温中子和同步加速器衍射技术。该奖项预计将为未来的研究人员提供培训，使他们掌握中子和X射线联合衍射确定结构、透射电子显微镜等技术，这些技术将使他们获得与新的和现有的中子相关的研究经验。

This Materials World Network award to Ohio State University is for collaborative research to model, synthesize and characterize new transition metal oxide and pseudo-oxide perovskites, which exhibit multiferroic behavior and/or significant magnetoelectric coupling. This award is co-funded by the Solid State Chemistry Program and the Europe and Eurasia Program in the Office of International Science and Engineering at NSF. Multiferroic materials exhibit ferro-, ferri- or antiferromagnetic ordering in coexistence with ferroelectric ordering. Most, if not all potential applications of multiferroic materials are based on exploitation of the magnetoelectric effect, whereby the electric and magnetic polarizations are coupled. This rare type of coupling, if it can be exploited, would enable completely novel ways of storing, transmitting and processing electronic information including magnetically recorded ferroelectric memory, stationary radar arrays, and RF communications. The project will comprise several mutually interdependent research tasks involving complex mixed-metal oxides that may show both magnetic and electric ordering, synthesis of the high quality single phase materials, complete structural characterization using a combination of variable temperature, high resolution laboratory and synchrotron powder X-ray diffraction, neutron powder diffraction, and transmission electron microscopy techniques. These efforts will be coupled with measurements of the magnetic and electric properties and the coupling between the two, and guided by computational modeling using tools that range from bond valence optimization algorithms to spin dependent density functional band structure calculations. The discovery of new magnetoelectric materials and the exploration of the composition structure property relationships for the above systems can be considered as the main possible outcome of the project. Researchers from Ohio State University (synthesis, basic characterization, computation), Moscow State University (advanced TEM) and the University of Sydney (neutron, x-ray spectroscopy) are involved in this collaborative research with scientists in each location contributing its complementary strengths. This grant will support student and faculty exchanges between the three institutions and will also provide access to state of the art neutron diffraction facilities and high pressure high temperature synthetic capabilities. The award will support research activities and brings together research infrastructure and expertise in a number of areas, including computational modeling of perovskites, high pressure-high temperature synthesis and electron microscopy, and variable temperature neutron and synchrotron diffraction techniques. The award is expected to train future researchers with techniques such as structure determination by combined neutron and X-ray diffraction, transmission electron microscopy, etc., that would give them research experience associated with new and existing neutro