Surface structure and magnetic properties for Co, Fe and rubrene on Ir(111)

• Main Authors: Jiang, Pei-Cheng, 江培成
• Other Authors: Tsay, Jyh-Shen
• Format: Others
• Language: en_US
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/5q33cv

博士 === 國立臺灣師範大學 === 物理學系 === 105 === In recent years, the surface and interfaces interactions play an important role in developing of spintronic application. There are many interfacial phenomenon such as exchange couple, multiferroic, spin-reorientation transition, magnetic proximity effect. According to the transition metals grown on Ir may present large lattice mismatch at the surface and interface, the Fe and Co grown on Ir both show unique interfacial phenomena. The magnetic properties are investigated by surface magneto-optic Kerr effect (SMOKE). The structures are investigated by low-energy electron diffraction (LEED) and scanning tunneling microscopy (STM). The chemical state of interfaces are investigated by Auger electron spectroscopy (AES). In addition, because of the possible functional applications in semiconductor devices, metal-semiconductor interfaces are also attentive in decades. The most interesting material is organic-semiconductor due to the potential uses of low-cost and flexible-substrate-based electronic devices. According to the Ir substrate is high interactive to carbon atoms, the self-assemble Rubrene film grown on Ir is also observed by STM technique. On the other hand, the transition metals are highly reactive at the interface of the semiconductor substrate such as Si in production process. Thus, the silicide formation at interfaces are also attentive. The morphologies combining chemical states for Ni grown on Si(111) are investigated. Furthermore, the Ni silicide formation is observed and identified at the Ni/Si interface. No matter metal/metal, molecule/metal or metal/semiconductor interface, the interfacial phenomena are investigated and show great potential for applied devices.