Effect of annealing temperature on the magnetic properties of Zn0.97Al0.03O nanoparticles

✍ Scribed by Gao, Hua ;Gao, Daqiang ;Yang, Guijin ;Zhang, Jing ;Zhang, Jinlin ;Shi, Zhenhua ;Xue, Desheng

• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 860 KB
• Volume: 208
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.201127109

✦ Synopsis

Abstract

Al doped ZnO nanoparticles were synthesized by the sol‐gel technique. X‐ray diffraction, selected area electron diffraction, inductively coupled plasma‐atomic emission and X‐ray photoelectron spectroscopy results ruled out impurity and other phases in Zn~0.97~Al~0.03~O nanoparticles annealing at different temperatures. Magnetic measurements indicate that all the samples have the obvious room temperature ferromagnetism. With the increase of annealing temperatures from 500 to 900 °C, the saturation magnetization of nanoparticles decreases with the reduction of defect‐related emission. Together with the electron paramagnetic resonance results, the observed ferromagnetic ordering of Zn~0.97~Al~0.03~O nanoparticles annealing at different temperatures is consider to be related to the singly charged oxygen vacancies.