Carriers, Ferromagnetism, and Spin Waves in Mn doped Cd Chalcogenide Nanocrystals

该项目旨在控制稀磁性纳米晶半导体中的化学反应，以操纵交换相互作用，从而使材料可用于未来的电子架构。通过系统地研究一系列掺杂锰的稀磁性半导体纳米晶体的磁性、热容量和光学性质，建立自一致的磁交换模型。磁和热容测量所探测到的交换相互作用有望与磁光测量相关联。结合这些方法，将使我们能够理解这些纳米晶体材料中轨道相互作用的大小依赖变化，并将有助于开发用于未来基于自旋的电子和基于存储的技术的新材料。NSF项目将支持3名研究生和6名研究小组成员。此外，拨款将直接资助两名人数不足的学生，让他们接触尖端科技，提高他们在科学方面的竞争力。为了加强文化多样性和拓展，这两个群体在历史上都吸引了代表性不足的学生参加他们的研究和教学项目。本提案发展新型稀磁纳米晶半导体。科学建立在PI在这些独特材料上的领先发展上，这些材料显示出轨道相互作用的大小依赖变化，这些特性可能有助于未来电子和基于存储技术的新材料的开发。该提案中开发的技术将提高我们科学家的竞争力，从而提高美国在全球的竞争力。通过系统地研究磁性和磁光方法探测到的交换相互作用，可以发展交换的基本原理和交换耦合的控制。NSF项目将支持3名研究生和6名研究小组成员。此外，拨款将直接资助两名人数不足的学生，让他们接触尖端科技，提高他们在科学方面的竞争力。为了加强文化多样性和拓展，这两个群体在历史上都吸引了代表性不足的学生参加他们的研究和教学项目。

This project aims to control the chemistry in dilute magnetic nanocrystalline semiconductors to manipulate exchange interactions that will lead to materials employable in future electronic architectures. By systematically investigating the magnetic, heat capacity, and optical properties of a series of manganese doped dilute magnetic semiconductor nanocrystals, a self-consistent magnetic exchange model will be developed. The exchange interactions probed by magnetic and heat capacity measurements are expected to correlate with the magneto-optical measurements. In combination these methods will allow an understanding of the size dependent changes of orbital interactions in these nanocrystalline materials and will help in the development of new materials for future spin-based electronics and memory-based technologies. The NSF program will support 3 graduate students, but 6 members of the research group. In addition the funding will be utilized in direct support of two under represented students to enhance their competitiveness in science by allowing exposure to cutting edge technologies. To enhance cultural diversity and outreach, both groups have historically attracted under represented students to their research and teaching programs. %%%This proposal develops novel dilute magnetic nanocrystalline semiconductors. The science builds on the PI's leading developments in these unique materials exhibiting size dependent changes of orbital interactions, properties that may help in the development of new materials for future electronics and memory based technologies. The technology developed in the proposal will allow the competitiveness of our scientists and thus the US to compete globally. By systematically investigating the exchange interactions probed by magnetic and magneto-optical methods, the fundamentals of exchange and the control of exchange coupling can be developed. The NSF program will support 3 graduate students, but 6 members of the research group. In addition the funding will be utilized in direct support of 2 under represented students to enhance their competitiveness in science by allowing exposure to cutting edge technologies. To enhance cultural diversity and outreach, both groups have historically attracted under represented students to their research and teaching programs.