The origin of magnetism in transition metal-doped ZrO2 thin films: Experiment and theory
Chikoidze, Ekaterina G.
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AbstractWe have investigated the magnetic properties of Fe/Co/Ni-doped ZrO 2 laser ablated thin films in comparison with the known results of Mn-doped ZrO2, which is thought to be a promising material for spintronics applications. It is found that doping with a transition metal can induce room temperature ferromagnetism in 'fake' diamond. Theoretical analysis based on density functional theory confirms the experimental measurements, by revealing that the magnetic moments of Mn- and Ni-doped ZrO2 thin films are much larger than that of Fe- or Co-doped ZrO2 thin films. Most importantly, our calculations confirm that Mn- and Ni-doped ZrO2 show a ferromagnetic ground state in comparison to Co- and Fe-doped ZrO 2, which favor an antiferromagnetic ground state. © 2013 IOP Publishing Ltd.
SponsorsThe authors thank A T Raghavender for some assistance in making targets by sol-gel method, and C K Park for the Mn-doped ZrO<INF>2</INF> samples. We gratefully acknowledge project 3348-20120033 of the National Research Foundation of Korea and Ehime University Project for the Promotion of International Relations between SNU and EU for their financial supports. We also acknowledge financial support from the Ile de France region for magnetic measurements ('NOVATECS' C'Nano IdF project no. IF-08-1453/R). AR acknowledges P Paruch group at the DPMC of Geneva University for assistance in AFM measurements.