CAREER: Novel High Magnetoresistance Oxide Thin Film Materials

9701581铃木这个职业项目致力于解决结构扭曲在铁磁性钙钛矿材料磁性中的作用。一个主要的目标是将结构扭曲与磁性联系起来，以阐明异常大的磁阻效应的起源。在谨慎取向的衬底上生长的薄膜中，立方钙钛矿型铁磁体的晶格应变效应将被研究，特别是在压电体上。在压电基板上的薄膜样品中，通过在基板上施加电压，可以在外部对样品施加应变。这些研究旨在阐明结构扭曲对磁性的影响，包括磁阻响应和居里温度，从而确定合适的理论解释。相反，改变磁相互作用强度对结构和磁性的影响将在相关的层状铁磁钙钛矿中进行研究，这些层状铁磁钙钛矿最近才被大量分离，并在铁磁和顺磁立方钙钛矿的异质结构中进行研究。这一系列薄膜样品有望独特地实现结构和磁性的系统调节。将开发一个将磁学研究整合到本科生和研究生经历中的教育计划。这包括为高级本科生和研究生开设的磁学课程，以及高级磁学实验室课程和PI实验室的本科生实习。目的是为材料科学、凝聚态物理和固体化学奠定坚实的基础，特别是培养学生的实验和分析技能。%该项目致力于具有高度技术相关性的材料科学主题领域的前沿研究问题。这项研究将在基础水平上为磁性材料和器件的重要方面贡献基本的材料科学知识。此外，L从研究中获得的基础知识和理解有望为改进材料和材料组合的设计和生产提供基本的理解和基础，从而有助于提高先进器件和电路的性能。该计划的一个重要特点是强调教育，并通过在一个具有根本和技术意义的研究领域对学生进行培训，将研究与教育相结合。***

9701581 Suzuki This CAREER project addresses the role of structural distortions in magnetic properties of ferromagnetic perovskite materials. A major objective is to correlate structural distortions with magnetic properties to shed light on the origin of anomalously large magnetoresistance effects. Effects of lattice strain of cubic perovskite ferromagnets in thin films grown on prudently oriented substrates, in particular piezoelectrics, will be studied. In thin film samples on piezoelectric substrates, strain can be applied to the sample externally by applying a voltage to the substrate. These studies aim to elucidate the effect of structural distortion on the magnetic properties, including magnetoresistive response and Curie temperature, and thus identify appropriate theoretical interpretations. Conversely the effect of varying the strength of the magnetic interactions on the structural and magnetic properties will be studied in related layered ferromagnetic perovskites that have only recently been isolated in bulk and in heterostructures of ferromagnetic and paramagnetic cubic perovskites. This series of thin film samples is expected to uniquely allow systematic tuning of structural and magnetic properties. An education program in which the magnetics research is integrated into undergraduate and graduate experiences will be developed. This includes a course on magnetics for advanced undergraduates and graduate students, and advanced magnetics lab course and undergraduate internships in the PI's lab. The aim is to provide a firm foundation in materials science, condensed matter physics and solid state chemistry, and especially to develop students' experimental and analytical skills. %%% The project addresses forefront research issues in a topical area of materials science having high technological relevance. The research will contribute basic materials science knowledge at a fundamental level to important aspects of magnetic materials and devices, in general. Additionally, the fundamenta l knowledge and understanding gained from the research is expected to contribute to improving the performance of advanced devices and circuits by providing a fundamental understanding and a basis for designing and producing improved materials, and materials combinations. An important feature of the program is the emphasis on education, and on the integration of research and education through the training of students in a fundamentally and technologically significant research area. ***