The effect of Al3+ co-doping on the structural, magnetic and optical properties of ZnCoO thin films

✍ Scribed by P. Cao; Y. Bai; D.X. Zhao; D.Z. Shen

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 354 KB
• Volume: 14
• Category: Article
• ISSN: 1369-8001
• DOI: 10.1016/j.mssp.2011.01.012

✦ Synopsis

Zn 0.99 À x Co 0.01 Al x O (x =0, 0.005, 0.01, 0.02) thin films have been prepared by a sol-gel method. The structural, optical and magnetic properties of the samples were investigated. X-ray diffraction, X-ray photoelectron and UV absorption spectroscopy analyses indicate that Al 3 + and Co 2 + substitute Zn 2 + without changing the wurtzite structure. The (Al, Co) co-doped samples are ferromagnetic at room temperature, and the ferromagnetic moment increased with increasing concentration of Al 3 + . It was demonstrated experimentally that high-temperature ferromagnetism in Co-doped ZnO thin films can be obtained through increasing the carrier concentration, which was realized by doping a few percent of Al ions using a simple fabrication method.