Neutron Scattering Studies of Diluted Magnetic Semiconductors

稀磁半导体的中子散射研究

• 批准号: 8821635
• 负责人: Jacek Furdyna
• 金额: $ 30.69万
• 依托单位: University of Notre Dame
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-02-01 至 1992-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8821635&HistoricalAwards=false
• 关键词: Neutron; Scattering; Studies; Diluted; Magnetic

They will focus on extending neutron scattering studies in two entirely new directions. Because of the recent advances in the preparation of diluted magnetic semiconductors (DMS) layered structures (epilayers and superlattices), by molecular beam epitaxy, and because of the opportunities which these advances provide for structuring novel spin configurations, they will focus on neutron scattering in layered DMS systems. Similarly, advances in bulk crystal growth have extended the field of DMS to alloys based on transition metals other than manganese (e.g., zinc1-xcobaltxsulfur, zinc1-xironxselenium). Neutron studies of these systems will provide information on the interactions between the iron and the cobalt ions, which are magnetically quite different fron manganese. Finally, they will continue their neutron studies of the manganese-based DMS alloys with a view at elucidating the spin freezing process occuring in these materials at low temperatures.

他们将专注于在两个全新的方向上扩展中子散射研究。 由于最近在通过分子束外延制备稀磁半导体 (DMS) 层状结构（外延层和超晶格）方面取得了进展，并且由于这些进展为构造新颖的自旋构型提供了机会，因此他们将重点关注层状 DMS 系统中的中子散射。 同样，块状晶体生长的进步将 DMS 的领域扩展到基于锰以外的过渡金属的合金（例如，锌 1-x 钴 x 硫、锌 1-x 铁 x 硒）。 这些系统的中子研究将提供有关铁离子和钴离子之间相互作用的信息，铁离子和钴离子在磁性上与锰有很大不同。 最后，他们将继续对锰基 DMS 合金进行中子研究，以期阐明这些材料在低温下发生的旋转冷冻过程。