NSF-EC: Magnetotransport in Layered Structures

NSF-EC：层状结构中的磁输运

• 批准号: 0131883
• 负责人: Peter Levy
• 金额: $ 17.2万
• 依托单位: New York University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-05-15 至 2005-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0131883&HistoricalAwards=false
• 关键词: NSF; EC; Magnetotransport; Layered; Structures

This project is co-funded by the Division of Materials Research and the Office of Multidisciplinary Activities, both within the Directorate for Mathematical and Physical Sciences, and the International Division as a cooperative activity in materials sciences between the National Science foundation and the European Commission (NSF solicitation 01-105). The project involves the EC Research Training Network (RTN) on Computational Magnetoelectronics whose lead institutions include Daresbury Laboratory (United Kingdom), FZ Juelich (Germany), MSP-MPI Halle (Germany), CNRS Orsay (France), TU Vienna (Austria), University of Twente (Netherlands), Uppsala University (Sweden), Academy of Sciences - Budapest (Hungary) and Institute of Physics of Materials Brno (Czechia). This grant will enable the US research group at NYU to collaborate with members of the EC RTN. The NYU group is focused on analytic and model calculations in magnetoelectronics, whereas the EC expertise is in ab initio calculations of electronic structure and magnetic and transport properties of solids. The RTN is using ab initio methods to assess the importance on the transport properties of magnetic multilayers and tunnel junctions of features identified from calculations based on model Hamiltonians. Specifically, for metallic multilayers the role of spin flip scattering by impurities on magnetoresistance (MR) will be studied, as well as resistivity and MR for currents perpendicular to the layers and the role of anisotropy compared to giant MR in magnetic multilayers. For magnetic tunnel junctions the in-plane lattice constant and the interlayer distance at interfaces will be relaxed to determine the effects on tunneling. In addition, the surface band structures at electrode/barrier interfaces, determined by full potential methods, will be incorporated into the calculations of junction MR. %%%This project is co-funded by the Division of Materials Research and the Office of Multidisciplinary Activities, both within the Directorate for Mathematical and Physical Sciences, and the International Division as a cooperative activity in materials sciences between the National Science foundation and the European Commission (NSF solicitation 01-105). The project involves the EC Research Training Network (RTN) on Computational Magnetoelectronics whose lead institutions include Daresbury Laboratory (United Kingdom), FZ Juelich (Germany), MSP-MPI Halle (Germany), CNRS Orsay (France), TU Vienna (Austria), University of Twente (Netherlands), Uppsala University (Sweden), Academy of Sciences - Budapest (Hungary) and Institute of Physics of Materials Brno (Czechia). This grant will enable the US research group at NYU to collaborate with members of the EC RTN. The NYU group is focused on analytic and model calculations in magnetoelectronics, whereas the EC expertise is in ab initio calculations of electronic structure and magnetic and transport properties of solids. ***

该项目由数学和物理科学理事会内的材料研究司和多学科活动办公室以及国际司共同资助，作为国家科学基金会和欧盟委员会之间材料科学的合作活动（ NSF 征集 01-105）。 该项目涉及 EC 计算磁电子学研究培训网络 (RTN)，其牵头机构包括 Daresbury Laboratory（英国）、FZ Juelich（德国）、MSP-MPI Halle（德国）、CNRS Orsay（法国）、TU Vienna（奥地利） 、特文特大学（荷兰）、乌普萨拉大学（瑞典）、布达佩斯科学院（匈牙利）和材料物理研究所布尔诺（捷克）。这笔赠款将使纽约大学的美国研究小组能够与 EC RTN 的成员合作。 纽约大学小组专注于磁电子学中的分析和模型计算，而 EC 的专业知识是电子结构以及固体的磁性和输运特性的从头计算。 RTN 正在使用从头计算的方法来评估磁性多层和隧道结传输特性的重要性，这些特性是根据哈密顿量模型的计算确定的。 具体来说，对于金属多层，将研究杂质引起的自旋翻转散射对磁阻 (MR) 的作用，以及垂直于层的电流的电阻率和 MR，以及与磁性多层中的巨型 MR 相比的各向异性的作用。对于磁隧道结，面内晶格常数和界面处的层间距离将被放宽以确定对隧道效应的影响。 此外，通过全电位方法确定的电极/势垒界面的表面能带结构将被纳入结MR的计算中。 %%%该项目由数学和物理科学局的材料研究部和多学科活动办公室以及国际部共同资助，作为美国国家科学基金会和美国国家科学基金会之间的材料科学合作活动欧盟委员会（NSF 征集 01-105）。 该项目涉及 EC 计算磁电子学研究培训网络 (RTN)，其牵头机构包括 Daresbury Laboratory（英国）、FZ Juelich（德国）、MSP-MPI Halle（德国）、CNRS Orsay（法国）、TU Vienna（奥地利） 、特文特大学（荷兰）、乌普萨拉大学（瑞典）、布达佩斯科学院（匈牙利）和材料物理研究所布尔诺（捷克）。这笔赠款将使纽约大学的美国研究小组能够与 EC RTN 的成员合作。 纽约大学小组专注于磁电子学中的分析和模型计算，而 EC 的专业知识是电子结构以及固体的磁性和输运特性的从头计算。 ***