NSF-EC: Magnetotransport in Layered Structures

该项目由材料研究部和多学科活动办公室共同资助，这两个部门都在数学和物理科学理事会内，国际部作为国家科学基金会和欧洲委员会之间的材料科学合作活动（NSF征集01-105）。 该项目涉及欧共体计算磁电子学研究培训网络，其牵头机构包括达雷斯伯里实验室（联合王国）、FZ Juelich（德国）、MSP-MPI Halle（德国）、CNRS奥赛（法国）、维也纳工业大学（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）和布尔诺材料物理研究所（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的分析和模型计算，而EC的专业知识是电子结构和磁性的从头计算和固体的输运性质。RTN正在使用从头算方法来评估磁性多层膜和隧道结的传输特性的重要性，这些特性是根据模型哈密顿量计算确定的。 具体而言，对于金属多层膜的自旋翻转散射的作用，杂质的磁阻（MR）将进行研究，以及电阻率和MR的电流垂直的层和各向异性的作用相比，巨磁电阻在磁性多层膜。对于磁性隧道结，面内晶格常数和界面处的层间距离将被放宽以确定对隧穿的影响。 此外，电极/势垒界面处的表面能带结构，由全电位方法确定，将被纳入结MR的计算中。%该项目由材料研究部和多学科活动办公室共同资助，两者都在数学和物理科学理事会内，和国际分部作为国家科学基金会和欧洲委员会之间的材料科学合作活动（NSF征集01-105）。 该项目涉及欧共体计算磁电子学研究培训网络，其牵头机构包括达雷斯伯里实验室（联合王国）、FZ Juelich（德国）、MSP-MPI Halle（德国）、CNRS奥赛（法国）、维也纳工业大学（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）和布尔诺材料物理研究所（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的分析和模型计算，而EC的专业知识是电子结构和磁性的从头计算和固体的输运性质。***

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. ***