Fe implanted ferromagnetic ZnO

Paramagnetism and antiferromagnetic interactions in single-phase Fe-implanted ZnO.

As the intrinsic origin of the high-temperature ferromagnetism often observed in wide-gap dilute magnetic semiconductors becomes increasingly debated, there is a growing need for comprehensive studies on the single-phase region of the phase diagram of these materials. Here we report on the magnetic and structural properties of Fe-doped ZnO prepared by ion implantation of ZnO single crystals. A ...

Ferromagnetic behaviour of Fe-doped ZnO nanograined films

The influence of the grain boundary (GB) specific area s GB on the appearance of ferromagnetism in Fe-doped ZnO has been analysed. A review of numerous research contributions from the literature on the origin of the ferromagnetic behaviour of Fe-doped ZnO is given. An empirical correlation has been found that the value of the specific grain boundary area s GB is the main factor controlling such...

Ferromagnetism and suppression of metallic clusters in Fe implanted ZnO – a phenomenon related to defects?

We investigated ZnO(0001) single crystals annealed in high vacuum with respect to their magnetic properties and cluster formation tendency after implant-doping with Fe. While metallic Fe cluster formation is suppressed, no evidence for the relevance of the Fe magnetic moment to the observed ferromagnetism was found. The latter along with the cluster suppression is discussed with respect to defe...

Photoluminescence and damage recovery studies in Fe-implanted ZnO single crystals

We report Fe-related emission in ion-implanted ZnO single crystals. Iron ions were implanted at room temperature with 100 keV and a fluence of 1310 Fe/cm, and were submitted to annealing treatments in vacuum and in air. After implantation, the damage raises the minimum yield (xmin) from 2% to 50%. Annealing in an oxidizing atmosphere leads to a reduction of the implantation damage, which is ful...

Ferromagnetic ZnO Nanowires for Spintronic Applications