Physics and Chemistry of Semimagnetic Semiconductors

建议开展跨学科合作研究 麻省理工学院的弗朗西斯痛苦的国家磁铁之间的计划， 实验室，布朗大学化学系，和 塔夫茨大学物理系， 半磁性材料的物理行为和晶体化学 半导体 他们计划研究含锰的亚锡酸盐晶体， Fe、Ni和Co，具有Fe和Mn的II-VI族化合物，以及Mn- 黄铜矿，重点是以下问题： i）亚锡酸盐中的大极化子效应。 （2）金属-绝缘体过渡。 iii）铁合金中的磁性和极化子形成。 iv）非线性性质和新颖状态 硒化镉汞 v）晶体化学，以确定何时以及如何 磁性离子以共价键结合， 键合半导体 这些问题将用各种技术来研究 包括拉曼散射，磁反射，发光， 磁化、磁化率、电输运，以及 非线性光学在NML和/或塔夫茨。 晶体化学研究 将在布朗大学举行。

It is proposed a collaborative interdisciplinary research program, between the MIT Francis Bitter National Magnet Laboratory, the Chemistry Department of Brown University, and the Physics Department of Tufts University for a study of the physical behavior and crystal chemistry of semimagnetic semiconductors. They plan to study stannite crystals with Mn, Fe, Ni and Co, II-VI compounds with Fe and Mn, and Mn- chalcopyrites, with emphasis on the following problems: i) Large polaron effects in stannites. ii) The metal-insulator transition. iii) Magnetism and polaron formation in Fe-alloys. iv) Nonlinear properties and novel states of HgCdFeSe. v) Crystal chemistry to determine when and how magnetic ions are incorporated in covalently- bonded semiconductors. These problems will be investigated with a variety of techniques including Raman scattering, magnetoreflectance, luminescence, magnetization, susceptibility, electrical transport, and nonlinear optics at NML and/or Tufts. Crystal chemistry studies will be performed at Brown University.