کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1788889 | 1023483 | 2010 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Room temperature ferromagnetism in Ni-doped ZnO films Room temperature ferromagnetism in Ni-doped ZnO films](/preview/png/1788889.png)
Zn1−xNixO (x = 0.02, 0.03, 0.04, 0.05, 0.07) films were prepared using magnetron sputtering. X-ray diffraction indicates that all samples have a wurtzite structure with c-axis orientation. X-ray photoelectron spectroscopy results reveal that the Ni ion is in a +2 charge state in these films. Magnetization measurements indicate that all samples have room temperature ferromagnetism. In order to elucidate the origin of the ferromagnetism, Zn0.97Ni0.03O films were grown under different atmospheric ratios of argon to oxygen. The results show that as the fraction of oxygen in the atmosphere decreases, both the saturation magnetization and the number of oxygen vacancies increase, confirming that the ferromagnetism is correlated with the oxygen vacancy level.
Journal: Current Applied Physics - Volume 10, Issue 1, January 2010, Pages 124–128