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：最近的进展，使纳米级控制氧化物异质结构的沉积带来了钙钛矿革命的边缘。这些材料的非凡功能为阐明新物理学提供了绝佳的机会，这也是当前项目的目标。这项工作涉及磁输运现象的研究，如界面磁相分离，电荷和自旋输运在新型高迁移率金属，高静电感应电荷密度在氧化物界面。重点放在理解铁磁氧化物/非铁磁氧化物界面的结构，化学，磁性和运输。这些研究将极大地增强目前对钙钛矿异质结构的理解，开辟氧化物电子学应用的新领域，并推进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、有效的公众宣传以及学生和博士后的教育和培训有关的社会效益。这些教育和推广活动围绕着从事研究工作的青年科学家，有效地将研究、教育和推广结合起来。 非技术性：氧气是我们日常生活中熟悉的元素。也许不太熟悉的是由金属元素与氧反应形成固体氧化物而形成的化合物。这些氧化物是目前科学界最有用的材料之一，从简单的陶瓷到高科技设备，如计算机处理器和硬盘驱动器。钙钛矿是氧化物的一种形式，已被证明是凝聚态物理学的一个肥沃的领域，产生了高温超导性和对磁场的巨大敏感性等突破。目前的项目旨在利用这些材料在精心设计的纳米结构中显着的磁性和电子特性。这些人工结构产生的物理现象在自然发生的材料中是不可能的，为新的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。除了科学研究外，该项目还涉及对学生的教育和培训，以及对公众的宣传。这些活动的中心是年轻研究人员的参与，他们承担了大部分工作，有效地将研究和教育结合在一个项目中。