Thomas Tietze

TL;DR: In this article, the magnetic and transport properties of 5% Co-doped and undoped ZnO thin films were investigated by pulsed laser deposition and they showed paramagnetic and ferromagnetic behavior as well as high magnetoresistance and a small anomalous Hall effect.

TL;DR: In this paper, the origin of room temperature ferromagnetism in diluted magnetic semiconductor materials was investigated using X-ray magnetic circular dichroism (XMCD) spectroscopy, which has been used in total electron yield, total fluorescence yield, and reflection mode.

TL;DR: In this article, the influence of the grain boundary (GB) specific area s GB on the appearance of ferromagnetism in Co-doped ZnO has been analyzed based on a review of numerous research contributions from the literature on the origin of the ferromagnetic behaviour of Co-DopedZnO.

TL;DR: It is demonstrated that the magnetic volume fraction is strongly related to the sample volume fraction occupied by grain boundaries, and ferromagnetic coupled electron states are found in ZnO grain boundaries with molecular dynamics and density functional theory.

TL;DR: The influence of the grain boundary (GB) specific area sGB on the appearance of ferromagnetism in Fe-doped ZnO has been analysed and an empirical correlation has been found that the value of the specific grain boundary area s GB is the main factor controlling such behaviour.