Magnetic properties of Mn doped ZnO tetrapod structures

Roy, V.A.L. , Djurišić, A.B., Liu, H., Zhang, X.X., Leung, Y.H., Xie, M.H., Gao, J., Lui, H.F. and Surya, C. (2004) Magnetic properties of Mn doped ZnO tetrapod structures. Applied Physics Letters, 84(5), pp. 756-758. (doi: 10.1063/1.1645312)

Abstract

ZnO tetrapod nanostructures were prepared by evaporating Zn metal under humid argon flow. After the fabrication, Mn diffusion doping was performed at two different temperatures (600 and 800 °C). The samples were characterized by scanning electron microscopy, transmission electron microscopy, x-ray fluorescence, x-ray diffraction (XRD), superconducting quantum interference device magnetometer, and photoluminescence. Diffusion doping resulted in the increase of the size of tetrapods, but no new peaks were found in XRD spectrum. Mn doped ZnO tetrapod structures were found to be ferromagnetic with Curie temperature ∼50 K, and showed large coercive field (∼3500 Oe for 800 °C sample, ∼5500 Oe for 600 °C sample).

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Vellaisamy, Professor Roy
• Authors: Roy, V.A.L., Djurišić, A.B., Liu, H., Zhang, X.X., Leung, Y.H., Xie, M.H., Gao, J., Lui, H.F., and Surya, C.
• College/School: College of Science and Engineering > School of Engineering
• Journal Name: Applied Physics Letters
• Publisher: AIP Publishing
• ISSN: 0003-6951
• ISSN (Online): 1077-3118
• Published Online: 27 January 2004