Magneto-Optical Property of Cobalt-Coated Zinc Oxide Nanorods

• Main Authors: Ye, Syun-Long, 葉勳隆
• Other Authors: Hsu, Hua-Shu
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/5wp8wk

碩士 === 國立屏東大學 === 應用物理系碩士班 === 105 === 　　ZnO has attracted a lot of research interests and become a popular material in last decades because of its unique electrical、optical、chemical and piezoelectricity characteristic. In addition, transition metal (TM) doped ZnO has also been considered as a potentials for realized magnetic semiconductor for spintronics application. However, whether coating a TM on semiconductor nanostructures can make them ferromagnetic by interfacial charge transfer is also worthy of investigation. 　　In this work, the room-temperature ferromagnetic ZnO spin-polarized semiconductor band can be achieved by Co coating. Energy-dependent magnetic circular dichroism (MCD) and spectra, from which the difference between the absorptions of left and right circularly polarized light at particular energies can be determined, provide valuable information about the spin-polarized DOSs and their influence on the magnetic properties, helping to determine the origin of the ferromagnetism of the semiconductor. We expect such kind of hybrid magnetic nanostructures may be useful for opto-spintrionics application.