Magnetotransport in Perovskite Films and Heterostructures

钙钛矿薄膜和异质结构中的磁输运

• 批准号: 0804432
• 负责人: Christopher Leighton
• 金额: $ 36.5万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-11-01 至 2013-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0804432&HistoricalAwards=false
• 关键词: Magnetotransport; Perovskite; Films; Heterostructures

Technical:The recent advances that enable nm-level control over the deposition of oxide heterostructures have brought the perovskites to the verge of a revolution. The extraordinary functionality of these materials provides outstanding opportunities for elucidation of new physics, the goal of the current project. The work involves the study of magnetotransport phenomena such as interfacial magnetic phase separation, charge and spin transport in novel high-mobility metals, and high electrostatically-induced charge densities at oxide interfaces. Emphasis is placed on understanding the structure, chemistry, magnetism, and transport at ferromagnetic oxide / non-ferromagnetic oxide interfaces. These studies will greatly enhance the current understanding of perovskite heterostructures, opening up new areas of application in oxide electronics, and advancing our basic understanding of complex oxide interfaces. The broader impacts include the societal benefits associated with development of technological applications, effective outreach to the public, and education and training of students and post-docs. These education and outreach activities revolve around the young scientists performing the research work, effectively integrating research, education, and outreach. Non-Technical:Oxygen is an element that is familiar to us in our daily lives. Perhaps less familiar are the chemical compounds formed by reacting metallic elements with oxygen to form solid oxides. These oxides are some of the most useful materials of current scientific interest, with applications from simple ceramics, to high-tech devices such as computer processors and hard disk drives. The perovskites are a form of oxides that have proven to be a fertile area for condensed matter physics, yielding such breakthroughs as superconductivity at high temperatures, and giant sensitivity to magnetic fields. The current project aims to exploit the remarkable magnetic and electronic properties of these materials in carefully designed nanoscale structures. These artificial structures produce physical phenomena that are not possible in naturally occurring materials, providing potential for new electronics applications, as well as advancing our understanding of the fundamental physics of magnetism. In addition to scientific research the project also involves education and training of students, as well as outreach to the public. These activities center on the involvement of the young researchers performing the bulk of the work, effectively integrating research and education in a single project.

技术：最近的进步使NM级别控制氧化物异质结构的沉积使钙钛矿陷入了革命的边缘。这些材料的非凡功能为阐明新物理学的出色机会，这是当前项目的目标。这项工作涉及对新型高弹性金属中的磁相转移现象的研究，例如界面磁相分离，电荷和自旋转运，以及高静电诱导的氧化物界面电荷密度。重点放在了解铁磁氧化物 /非铁磁性氧化物界面上的结构，化学，磁性和运输。这些研究将极大地增强对钙岩异质结构的当前理解，开辟了新的氧化物电子应用领域，并促进了我们对复杂氧化物界面的基本理解。更广泛的影响包括与技术应用的发展，有效向公众推广以及学生和培训后的教育和培训相关的社会利益。这些教育和外展活动围绕着从事研究工作的年轻科学家，有效地整合了研究，教育和外展。 非技术：氧气是我们日常生活中我们熟悉的元素。也许不太熟悉的是通过与氧形成固体氧化物的金属元素反应形成的化学化合物。这些氧化物是当前科学兴趣的一些最有用的材料，从简单陶瓷到高科技设备，例如计算机处理器和硬盘驱动器。钙钛矿是一种证明是凝结物理物理物理的肥沃区域的一种形式，在高温下产生了超导性的突破，以及对磁场的巨大敏感性。当前的项目旨在利用精心设计的纳米级结构中这些材料的显着磁性和电子性能。这些人造结构产生的物理现象是在天然发生的材料中不可能的，为新电子应用提供了潜力，并促进了我们对磁性基本物理学的理解。除科​​学研究外，该项目还涉及对学生的教育和培训，以及向公众推广。这些活动集中在年轻研究人员的参与下，从事大部分工作，有效地将研究和教育整合到一个项目中。