Optical and magnetic properties ofc-oriented ZnCoO films

✍ Scribed by Zhou, Huijuan ;Knies, Christoph ;Hofmann, Detlev M. ;Stehr, Jan ;Volbers, Niklas ;Meyer, Bruno K. ;Chen, Limei ;Klar, Peter ;Heimbrodt, Wolfram

• Book ID: 105364015
• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 169 KB
• Volume: 203
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200669560

✦ Synopsis

Abstract

We investigated ZnCoO thin films prepared via sol‐gel methods and dip‐coating techniques. The Co concentrations range from 0.5% to 5%. The films show the wurtzite crystal structure of ZnO and are highly c ‐axis oriented grown on the quartz substrates. They have a typical grain size of 20 to 50 nm and a thickness between 300 nm and 1 µm. The fine structures of the Co (3d^7^) internal absorptions are well resolved, all zero‐phonon lines (ZPL) and phonon replica related to the ^4^T~1~(F) → ^4^A~2~ are observed, demonstrating the good crystalline quality of the layers and the incorporation of the Co^2+^ on Zn^2+^ lattice sites. The films show paramagnetic behaviour. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)