Effect of reduced lateral dimensions on the optical and magnetic properties of dilute magnetic and antiferromagnetic nanowires

减少横向尺寸对稀磁和反铁磁纳米线光学和磁性能的影响

• 批准号: 5428761
• 负责人: Professor Dr. Michael Fröba
• 金额: --
• 依托单位: I. Physikalisches Institut
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2004
• 资助国家: 德国
• 起止时间: 2003-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5428761?language=en
• 关键词: Effect; reduced; lateral; dimensions; optical

It is the aim of the project to synthesise extended, highly ordered arrays of magnetic and nonmagnetic semiconductor nanowires. The project is a close cooperation between the group of the applicant at the Department of Chemistry of the Justus-Liebig University in Gießen (part A of the project) and the group of the applicants at the Department of Physics of the Philipps-University of Marburg (part B of the project). The films of magnetic nanowires based on (Ga,Mn)As and (Ga,Mn)P compounds will be synthesised in Gießen. The magnetic, galvanomagnetic and magneto-optical spectroscopic studies will be carried out in Marburg. The magnetic and nonmagnetic semiconductor wire arrays will be prepared by incorporating (Ga,Mn)As and (Ga,Mn)P into mesoporous SiO2 template films with either a parallel arrangement of tube-like pores or a cubic grid of tube-like pores. The pore diameter can be adjusted by varying the synthesis conditions. Depending on the type of pore arrangement either non-interacting wires or interacting wires will be obtained after incorporation of the semiconductor. The template films will be synthesised on Si as well as on glass substrates. The electronic, optical and magnetic properties of the wire systems will be studied by magneto-optical spectroscopy and magneto-transport techniques. At the first stage of the project the characterisation will have accompanying character aiming at optimising the wire arrays. After the optimisation, we will aim at studying confinement effects in the wire structures. In the long run we want to focus on modifications of the rich magnetic phase diagrams of (Ga,Mn)As and (Ga,Mn)P due to reduced dimensions and possible applications in magneto-electronic and spintronic devices.

该项目的目的是合成磁性和非磁性半导体纳米线的扩展，高度有序的阵列。该项目是GießenJustus-Liebig大学化学系的申请小组（该项目的A部分）与Marburg Philipps-University物理学系（该项目B部分）的申请人小组之间的密切合作。基于（GA，MN）AS和（GA，MN）P化合物的磁性纳米线膜将在Gießen中合成。磁性，电磁和磁光谱研究将在马尔堡进行。通过将（GA，MN）AS和（GA，MN）P结合到中孔SIO2模板膜中，将制备磁性和非磁性半导体线阵列，并具有平行的管状孔或管状孔的立方网格。可以通过改变合成条件来调节孔径。根据孔隙排列的类型，在感染半导体后，将获得非交互线或相互作用的电线。模板膜将在SI和玻璃基板上合成。电线系统的电子，光学和磁性特性将通过磁光谱和磁通型传输技术进行研究。在项目的第一阶段，表征将涉及角色旨在优化电线阵列。优化后，我们将旨在研究线结构中的限制效应。从长远来看，我们希望集中于（GA，MN）AS和（GA，MN）P的丰富磁相图的修改，这是由于尺寸降低以及在磁电机和Spintronic设备中的可能应用而导致的。