Platform Renewal Proposal: MULTIFUNCTIONAL OXIDES MATERIALS TO DEVICES

《纲要》赠款的最初目标是：1。新材料的开发characterisation3。理论和模型的发展。针对这些目标，我们取得了以下成就：1 .基于铌酸银/多铁性/磁电材料（包括BiFeO32）的微波介质陶瓷/铌酸盐/无铅压电材料（包括BiFeO32）。首次在微波频率下表征了BiFeO3，建立了确定铁电薄膜性质的严格模型，扫描倏逝波显微镜；4器件/压电调谐介电谐振器滤波器额外输出预期之外：使用分层pcb几何结构的无铁芯变压器（根本没有铁磁铁芯）的开发和专利。展望新平台的目标是：1 .利用平台的灵活性进行投机性和冒险性的研究；2 .开发特别强调界面的薄膜多层；3 .开发新型器件；原型和应用4为了确保专业知识的保持，并确保重要的博士后人员能够发展他们的职业生涯并晋升到更高的职位，我们打算探索的研究领域是：*功能陶瓷的基础化学需要关注和了解陶瓷的化学、晶体结构和物理性质。这一知识对于薄膜的生产是至关重要的参考点，毕竟薄膜是由大块陶瓷目标制成的。我们将集中在三大类陶瓷：1。微波介质：压电材料:III。多铁性/磁电性：这建立在该小组在固态化学和电子和磁性陶瓷反应方面的专业知识之上。*薄功能氧化膜/先进的表征方法未来的趋势将是纳米级结构。我们的核心研究领域是：材料开发；薄膜沉积；结构和电气特性；设备的发展。未来的战略需要在TEM （McComb教授）和电子全息术（Harrison教授）领域的额外专业知识。*测试材料性能的新设备结构虽然材料的结构和电气性能可以并且将在开发过程中进行测试，但测试材料的一个非常有用的方法是在原型设备中评估其性能。这使我们能够评估对性能的不同影响。我们将研究超高Q结构和频率敏捷器件*使用密度泛函理论对结构进行建模线性标度DFT代码将有助于研究大型超晶格和多层薄膜的电学性质。取代和缺陷对大块陶瓷系统的影响也将被理解，大晶胞晶体如尖晶石和铁氧体的性质也将被理解。建模也将补充先进的表征技术和基础固态化学研究领域。

The original objectives of the Platform grant were:1. development of new materials2. characterisation3. theory and modelling development4. device developmentOur achivements against these objectives were:1 Microwave dielectric ceramics / Niobates / Pb Free pezoelectrics based on silver niobate / multiferroic/magnetoelectric materials including BiFeO32 First characterisation of BiFeO3 at microwave frequencies, rigorous models to determine properties in thin ferroelectric films, scanning evanescent wave microscopy3 Density Functional Perturbation Theory, mode matching for accurate values of loss and permittivity4 Devices / piezoelectrically tuned dielectric resonator filters Extra Outputs not anticipated: Development and patenting of core-less transformers (no ferromagnetic core at all) using layered pcb geometry.The Forward LookIn the new Platform the objectives are:1 To use the Platform flexibility to carry out speculative and adventurous research2 To develop thin film multilayers with particular emphasis on interfaces3 To develop novel devices, prototypes and applications4 To ensure that the expertise is maintained and that key postdoctoral staff can develop their careers and move to more senior positionsThe areas of research that we intend to explore are:* Fundamental chemistry of functional ceramicsThere is a need to focus on and understand the chemistry, crystal structure and physical properties of ceramics. This knowledge is vital as a reference point for the production of thin films, which are after all made from bulk ceramics targets. We will concentrate on three main groups of ceramics:I. Microwave dielectrics: II. Piezoelectrics: III. Multiferroics / magnetoelectrics: This builds on the group's expertise in the solid state chemistry and reactions of electronic and magnetic ceramics.* Thin functional oxide films / advanced characterisation methodsThe future trend will be towards nanoscale structures. Our core areas of research are: Materials development; thin film deposition; structural and electrical characterisation; device development. The future strategy requires extra expertise in the area of TEM (Professor McComb), electron holography (Harrison). * New device structures to test material propertiesWhilst a material's structural and electrical properties can and will be tested during development, a very useful method of testing a material is to assess its performance in a prototype device. This enables us to evaluate the different influences on performance. We will examine ultra High Q structures and frequency agile devices* Modelling of structures using density functional theoryLinear scaling DFT codes will faciltiate the study of the electrical properties of large superlattices and multilayered thin-films. The influence of substitutions and defects in bulk ceramic systems will also be accessible as will be the properties of large unit-cell crystals such as spinels and ferrites. Modelling will also complement the advanced characterisation techniques and fundamental solid-state chemistry areas of research.