CAREER: Novel High Magnetoresistance Oxide Thin Film Materials

9701581铃木这个职业项目解决了铁磁钙钛矿材料的磁性结构扭曲的作用。一个主要的目标是相关的结构扭曲与磁性能，揭示了起源的巨大的磁阻效应。本文将研究立方钙钛矿铁磁体在审慎取向衬底上生长的薄膜，特别是压电薄膜中晶格应变的影响。在压电衬底上的薄膜样品中，可以通过向衬底施加电压来从外部向样品施加应变。这些研究旨在阐明结构畸变对磁性能的影响，包括磁阻响应和居里温度，从而确定适当的理论解释。相反，将在相关的层状铁磁钙钛矿中研究改变磁相互作用的强度对结构和磁性的影响，这些层状铁磁钙钛矿最近才被隔离在大块中以及铁磁和顺磁立方钙钛矿的异质结构中。这一系列的薄膜样品，预计独特的结构和磁性能的系统调整。 将开发一个教育计划，其中磁学研究被整合到本科和研究生的经验。这包括一门针对高级本科生和研究生的磁学课程，以及高级磁学实验室课程和PI实验室的本科生实习。目的是提供材料科学，凝聚态物理和固态化学的坚实基础，特别是培养学生的实验和分析技能。%该项目解决了具有高技术相关性的材料科学主题领域的前沿研究问题。 该研究将在基本层面上为磁性材料和器件的重要方面提供基本的材料科学知识。 此外，从研究中获得的基础知识和理解有望通过为设计和生产改进的材料和材料组合提供基本理解和基础，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，并通过在基础和技术上重要的研究领域培养学生，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. ***