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.

该项目的目标是合成扩展的、高度有序的磁性和非磁性半导体纳米线阵列。该项目是位于吉ßen的Justus-Liebig大学化学系申请人小组（项目a部分）和马尔堡菲利普斯大学物理系申请人小组（项目B部分）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薄膜将在Gießen合成。磁学、流磁学和磁光谱学研究将在马尔堡进行。将（Ga,Mn）As和（Ga,Mn）P掺入具有管状孔平行排列或管状孔立方网格的介孔SiO2模板膜中，制备磁性和非磁性半导体线阵列。孔径可以通过改变合成条件来调节。根据孔排列的类型，在合并半导体后将得到非相互作用导线或相互作用导线。模板薄膜将在硅和玻璃衬底上合成。利用磁光谱学和磁输运技术研究金属丝系统的电子、光学和磁性。在项目的第一阶段，表征将伴随字符，旨在优化线阵列。优化后，我们将致力于研究线结构中的约束效应。从长远来看，我们希望将重点放在（Ga,Mn）As和（Ga,Mn）P的富磁相图的修改上，因为它们的尺寸减小了，并且可能在磁电子和自旋电子器件中应用。