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

该项目旨在控制稀磁纳米晶半导体中的化学物质，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锰掺杂稀磁半导体纳米晶的磁性、热容和光学性质，建立了一个自洽的磁交换模型。 交换相互作用探测的磁性和热容量的测量预计将与磁光测量。 结合这些方法将允许在这些纳米晶体材料中的轨道相互作用的大小依赖的变化的理解，并将有助于在未来的自旋为基础的电子和存储器为基础的技术的新材料的开发。 NSF计划将支持3名研究生，但研究小组的6名成员。 此外，这笔资金将用于直接支持两名代表不足的学生，通过接触尖端技术来提高他们在科学方面的竞争力。为了加强文化多样性和外展，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计划。 该提案开发了新型稀磁纳米晶半导体。 该科学建立在PI在这些独特材料中的领先发展的基础上，这些材料表现出轨道相互作用的尺寸依赖性变化，这些特性可能有助于开发用于未来电子和存储技术的新材料。 该提案中开发的技术将使我们的科学家具有竞争力，从而使美国能够在全球范围内竞争。 通过系统地研究磁性和磁光方法探测的交换相互作用，可以发展交换和交换耦合控制的基本原理。 NSF计划将支持3名研究生，但研究小组的6名成员。 此外，这笔资金将用于直接支持2名代表不足的学生，通过接触尖端技术来提高他们在科学方面的竞争力。 为了加强文化多样性和外展，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计划。

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.