The magnetic properties of Gd doped ZnO nanowires

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• 作者：Xiying Ma ^{maxy@mail.usts.edu.cn}
• 关键词：Zinc oxide ; Gadolinium ; Rare earth doping ; Nanowires ; Magnetic properties ; Magnetic moment ; Chemical vapor deposition
• 刊名：Thin Solid Films
• 出版年：2012
• 期刊代码：78_00406090
• 类别：ph
• 出版时间：30 June, 2012
• 卷：520
• 期：17
• 页码：5752-5755
• 文件大小：595 K

摘要

We present a study of the ferromagnetic properties of Gd doped ZnO nanowires (Nws) fabricated by means of a chemical vapor deposition process. The sample was grown with a Gd mole ratio 5%in a mixed Zn/Mn source under a constant O₂/Ar gas mixture flowing at 580 掳C followed by annealing at 800 掳C. We found that the magnetic properties of ZnO:Gd Nws are a function of the external magnetic field and temperature. An average value of the moment per Gd atom is as high as 3278 渭B as compared to its atomic moment of 8 渭B, showing that the ZnO:Gd Nws are an intrinsic diluted magnetic semiconductor. The unprecedented colossal moment is attributed to the effective Ruderman-Kittel-Kasuya-Yosida exchanging interaction.