U.S-Brazil Cooperative Science Program: Magnetism of Dilute Magnetic Semiconductors

这项美国-巴西合作科学奖将支持塔夫茨大学的雅科夫·夏皮拉和小N.F.奥利维拉的合作。和圣保罗大学(USP)的V.Bindilatti。该项目旨在关注稀磁半导体中的磁相互作用。这些材料是探索这些相互作用的基本性质的理想材料。研究人员的联合实验将利用USP使用一种新型塑料稀释冰箱产生的极低温度。这些实验将在塔夫茨集团所属的美国强磁场设施中进行。这些实验的目标将是回答各种基本问题，包括磁相互作用如何随着距离的增加而减弱。美方将受益于获得USP的新塑料稀释冰箱和超导磁铁。巴西方面将获得使用磁化步骤确定交换常数的专门知识，以及将在这些实验中使用的单晶的来源。

This U.S.-Brazil Cooperative Science award will support the collaboration of Yaacov Shapira of Tufts University and N.F. Oliveira, Jr. and V. Bindilatti of the University of Sao Paulo (USP), Brazil. The project aims to focus on magnetic interactions in dilute magnetic semiconductors. These materials are ideal for exploring the fundamental properties of these interactions. The researchers' joint experiments will take advantage of the very low temperatures which are being produced at USP using a new class of plastic dilution refrigerators. The experiments at very high magnetic fields will be conducted in U.S. high-magnetic-field facilities with which the Tufts group is affiliated. The goal of these experiments will be to answer various basic questions, including how the magnetic interactions fall off with distance. The U.S. side will benefit from access to USP's new plastic dilution refrigerators and superconducting magnets. The Brazilian side will acquire expertise in the use of magnetization steps to determine exchange constants, as well as sources for the single crystals to be used in these experiments.