Platform Renewal Proposal: MULTIFUNCTIONAL OXIDES MATERIALS TO DEVICES

平台更新提案：多功能氧化物材料到设备

• 批准号: EP/F067828/1
• 负责人: Neil Alford
• 金额: $ 105.85万
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2009
• 资助国家: 英国
• 起止时间: 2009 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FF067828%2F1
• 关键词: Platform; Renewal; Proposal; MULTIFUNCTIONAL; OXIDES

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.

平台赠款的最初目标是：1.开发新材料2.特征化3.理论和模型开发4.器件开发我们在这些目标上的成就是：1微波介电陶瓷/铌酸盐/基于银酸盐/多铁性/磁电材料的无铅压电体，包括BiFeO 32 BiFeO 3在微波频率下的首次表征，确定薄铁电膜特性的严格模型，扫描倏逝波显微镜3密度泛函微扰理论，损耗和磁导率精确值的模式匹配4器件/压电调谐介质谐振器滤波器未预期的额外输出：无铁心变压器的开发和专利申请（完全没有铁磁芯）。前瞻性在新平台中，目标是：1利用平台的灵活性进行投机性和冒险性研究2开发薄膜多层膜，特别强调界面3开发新颖的器件，原型和应用4为了确保专业知识得到保持，关键的博士后工作人员可以发展他们的职业生涯，并转移到更高的职位，我们打算探索的研究领域是：* 功能陶瓷的基础化学有必要关注和了解陶瓷的化学，晶体结构和物理性能。这些知识对于薄膜的生产至关重要，因为薄膜毕竟是由块状陶瓷靶制成的。我们将集中在三个主要类别的陶瓷：一。微波炉：二。压电：III.多铁性/磁电性：这建立在该集团在电子和磁性陶瓷的固态化学和反应方面的专业知识基础上。*薄功能氧化物薄膜/先进的表征方法未来的趋势将是纳米结构。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;器件开发。未来的战略需要在TEM（麦科姆教授），电子全息（Harrison）领域的额外专业知识。* 测试材料性能的新器件结构虽然材料的结构和电学性能可以在开发过程中进行测试，但测试材料的一种非常有用的方法是评估其在原型器件中的性能。这使我们能够评估对性能的不同影响。我们将研究超高Q结构和频率捷变器件 * 使用密度泛函理论的结构建模线性标度DFT代码将促进大型超晶格和多层薄膜的电学性质的研究。在大块陶瓷系统中的替代和缺陷的影响也将是可访问的，因为将是大的晶胞晶体，如尖晶石和铁氧体的性能。建模还将补充先进的表征技术和基本的固态化学研究领域。

项目成果

Optimizing strontium ruthenate thin films for near-infrared plasmonic applications.

• DOI: 10.1038/srep09118
• 发表时间: 2015-03-13
• 期刊: Scientific reports
• 影响因子: 4.6
• 作者: Braic L;Vasilantonakis N;Zou B;Maier SA;Alford NM;Zayats AV;Petrov PK
• 通讯作者: Petrov PK

Electrocaloric effect in lead-free Aurivillius relaxor ferroelectric ceramics

• DOI: 10.1016/j.actamat.2016.11.001
• 发表时间: 2017-02-01
• 期刊: ACTA MATERIALIA
• 影响因子: 9.4
• 作者: Axelsson, Anna-Karin;Le Goupil, Florian;Alford, Neil McN.
• 通讯作者: Alford, Neil McN.

Non-invasive assessment of leaf water status using a dual-mode microwave resonator.

• DOI: 10.1186/s13007-015-0054-x
• 发表时间: 2015
• 期刊: Plant methods
• 影响因子: 5.1
• 作者: Dadshani S;Kurakin A;Amanov S;Hein B;Rongen H;Cranstone S;Blievernicht U;Menzel E;Léon J;Klein N;Ballvora A
• 通讯作者: Ballvora A

Effect of ionic radii on the Curie temperature in Ba1-x-ySrxCayTiO3 compounds.

• DOI: 10.1038/srep28055
• 发表时间: 2016-06-21
• 期刊: Scientific reports
• 影响因子: 4.6
• 作者: Berenov A;Le Goupil F;Alford N
• 通讯作者: Alford N

Upper limit of the electrocaloric peak in lead-free ferroelectric relaxor ceramics

• DOI: 10.1063/1.4950790
• 发表时间: 2016-06-01
• 期刊: APL MATERIALS
• 影响因子: 6.1
• 作者: Le Goupil, Florian;Alford, Neil McN.
• 通讯作者: Alford, Neil McN.