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Abstract
The Fe-Doped ZnO system has good properties as a diluted magnetic semiconductor for spintronic applications. In this article, a review of some structural and magnetic properties of Fe-Doped ZnO is presented. Initially, a summary of the basic concepts is made to understand the spintronics concepts and their possible applications and, subsequently, the study of the Fe- Doped ZnO in samples obtained by mechanical alloy under different preparation conditions. Characterizations were made by means of X-ray diffractometry, Mössbauer spectroscopy, and vibrating sample magnetometry. The first preparation condition was an increase in the Fe concentration from 3 to 10 at % with 36 hours of milling time and a 15: 1 ball-to-powder weight ratio (BPR). In this case, there was a limited Fe concentration of approximately 5 % that was diluted into the ZnO matrix while the rest of Fe was segregated in the sample. For the second preparation condition, the Fe concentration was fixed at 10% and the milling time was varied. After 24 hours of milling, the sample was consolidated, but the Fe was not completely diluted into the ZnO matrix. Finally, using a 10% Fe concentration and increasing the BPR, all the Fe atoms were diluted in the ZnO phase without the presence of Fe segregates in the sample.
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