Inter-American Materials Collaboration: Magnetic Alloys Electrodeposited on Semiconductors: Structure and Properties

这次美洲材料合作由弗吉尼亚大学的Giovanni Zangari和巴西弗洛里亚诺波利斯圣卡塔琳娜大学的Wagner Figuereido领导的两个小组共同参与。该项目的重点是研究半导体上磁性金属和选定合金的电化学生长、结构和功能表征。利用这两个小组的现有工作，首次研究了在不同取向的硅和III-V半导体上单金属的电化学生长。其次是对技术上相关合金的生长和性能的研究。利用电化学技术和大量的结构和物理表征方法来定制生长条件，以生产性能最佳的薄膜。同时，建立了这些材料的电化学生长的理论模型，并通过与实验结果的比较来确定模型中的理论参数。本研究计划包括每个机构的两名博士生，他们在各自的材料系统上工作，但通过使用共同的方法和技术进行互动，并需要解决类似的问题。通过两个实验室之间定期交换学生和高级调查人员定期访问外国机构，加强了研究小组之间的密切合作。因此，学生们受到不同但综合的学习环境的影响，他们也积极地为此做出贡献。从技术角度来看，该项目通过创造有用的知识，为开发直接将磁性薄膜与半导体相结合的有效技术做出了相关贡献，为工业开发和实践做好了准备。该奖项由材料研究部、国际科学和工程办公室以及数学和物理科学局的多学科活动办公室提供支持。

This Inter-American Materials Collaboration brings together two groups led by Giovanni Zangari at the University of Virginia and Wagner Figuereido at the Universidade Federal de Santa Catarina, Florianopolis, Brazil. The project focuses on studies of the electrochemical growth, structural and functional characterization of magnetic metals and selected alloys on semiconductors. The electrochemical growth of single metals on Si and III-V semiconductors with various orientations is first studied leveraging existing work by the two groups. This is followed by studies of the growth and properties of technologically relevant alloys. Electrochemical techniques and a wide array of structural and physical characterization methods are utilized to tailor growth conditions for the production of films with optimum properties.In parallel, theoretical models of the electrochemical growth of these materials are developed and theoretical parameters in the model are determined by comparison with experimental results.This research program includes two Ph.D. students at each institution working on their own material system but interacting through the use of common methods and techniques and the need to solve similar problems. Close collaboration between the research groups is enhanced by the regular exchange of students between the two laboratories and periodical visits of the senior investigators to the foreign institution. The students are thus subject to different but integrated learning environments to which they also actively contribute. From the technical standpoint, this project provides a relevant contribution to the development of effective techniques for the direct integration of magnetic films with semiconductors, by creating useful knowledge, ready to be transferred to the industrial development and practice. This award is supported by the Division of Materials Research, the Office of International Science and Engineering, and the Office of Multidisciplinary Activities in the Directorate for Mathematical and Physical Sciences.