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

该项目的目标是对脉冲激光沉积（PLD）产生的复合氧化物的生长有基本的了解，从而能够优化制造具有高技术相关性的多铁氧化物系统的生长参数。在这个项目中，我们将通过实验确定依赖于生长参数的氧化膜的结构，并将研究其对磁性和铁电性能的影响。主要任务是通过应用最先进的原位x射线散射方法，将同步辐射集成到独特的原位PLD腔室中，研究这些材料在生长过程中的晶体膜结构和界面特性的演变，并辅以随后的生长后表征，通过电子显微镜，扫描探针显微镜和电和磁测量。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，这可能会使单层和多层具有出色的晶体和界面质量，从而提高多铁性能。研究中的系统将包括均匀的多铁性系统（LuFeO3/Lu2FeO4）和多铁性夹层(BaFe12O19 (BaM)/Ba0.5Sr0.5TiO3 (BSTO))，即由铁电和（反）铁磁成分组成的多层。为了实现这一目标，该项目汇集了德国和捷克的研究小组，他们在原位薄膜生长和x射线表征、透射电子显微镜及其应用研究薄膜和纳米结构的生长动力学和结构方面具有强大的理论、方法和仪器背景，并辅以一个大型磁实验室进行磁强计研究。

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.