An in-situ study of the growth kinetics of pulsed laser deposition of multiferroic complex oxides and its influence on the properties of magnetoelectric coupling

多铁复合氧化物脉冲激光沉积生长动力学及其对磁电耦合性能影响的原位研究

• 批准号: 412136875
• 负责人: Professor Dr. Tilo Baumbach
• 金额: --
• 依托单位: Laboratorium für Elektronenmikroskopie (LEM)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/412136875?language=en
• 关键词: situ; study; growth; kinetics; pulsed

The goal of the project is to gain fundamental understanding of the growth of complex oxides produced by pulsed laser deposition (PLD), thus enabling optimization of the growth parameters for fabrication of multiferroic oxide systems with high technological relevance.In this project we will experimentally determine the structure of the oxide films in dependence on the growth parameters and will study its influence on the magnetic and ferroelectric properties. The main task is to study the evolution of the crystalline film structure and interface properties of these materials in-situ during growth by applying most-advanced in-situ x-ray scattering methods with synchrotron radiation integrated into a unique in-situ PLD chamber, complemented by subsequent post-growth characterization by means of electron microscopy, scanning-probe microscopy and electric and magnetic measurements. In this way, we aim to gain deeper understanding of kinetic processes during growth, which may lead to single layers and multilayers with outstanding crystalline and interface quality resulting in improved multiferroic properties. The systems under study will comprise both homogeneous multiferroic systems (LuFeO3/Lu2FeO4) and multiferroic sandwiches (BaFe12O19 (BaM)/Ba0.5Sr0.5TiO3 (BSTO)), i.e. multilayers consisting of ferroelectric and (anti)-ferromagnetic components.To reach this goal, the project brings together German and Czech research groups with a strong background in theory, methods, and instrumentation for in-situ thin film growth and x-ray characterization, in transmission electron microscopy, and in their application to study growth kinetics and structure of thin films and nanostructures, complemented by a large magnetic laboratory for magnetometry studies.

本项目的目标是获得脉冲激光沉积（PLD）产生的复合氧化物的生长的基本理解，从而使具有高技术相关性的多铁性氧化物系统的制造的生长参数的优化。在本项目中，我们将实验确定依赖于生长参数的氧化物膜的结构，并将研究其对磁性和铁电性的影响。主要任务是研究这些材料的晶体薄膜结构和界面特性的演变，在原位生长过程中，通过应用最先进的原位X射线散射方法与同步辐射集成到一个独特的原位PLD室，补充了随后的生长后表征手段的电子显微镜，扫描探针显微镜和电磁测量。通过这种方式，我们的目标是更深入地了解生长过程中的动力学过程，这可能会导致单层和多层具有出色的结晶和界面质量，从而改善多铁性。所研究的系统将包括两个均匀的多铁性系统（LuFeO 3/Lu 2FeO 4）和多铁性三明治（BaFe 12 O 19（BaM）/Ba0.5Sr0.5TiO3（BSTO）），即由铁电和（反）铁磁成分组成的多层膜。为了实现这一目标，该项目汇集了德国和捷克的研究小组，他们在理论，方法，以及用于原位薄膜生长和X射线表征、透射电子显微镜及其在研究薄膜和纳米结构的生长动力学和结构中的应用的仪器，并辅之以用于磁力测量研究的大型磁性实验室。