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The origin of magnetism in transition metal-doped ZrO2 thin films: experiment and theory
Nguyen Hoa Hong1, Mohammed Benali Kanoun, Souraya Goumri-Said
1Department of Physics and Astronomy, Seoul National University, Gwanak-gu, Seoul 151-747, Korea.
Abstract:
We have investigated the magnetic properties of Fe/Co/Ni-doped ZrO2 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 ZrO2, which favor an antiferromagnetic ground state.
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