Department of Physics and Astronomy, Seoul National University, Gwanak-gu, Seoul 151-747, Korea.
J Phys Condens Matter. 2013 Oct 30;25(43):436003. doi: 10.1088/0953-8984/25/43/436003. Epub 2013 Oct 4.
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.
我们研究了 Fe/Co/Ni 掺杂 ZrO2 激光烧蚀薄膜的磁性，与已知的 Mn 掺杂 ZrO2 的结果进行了比较，后者被认为是自旋电子学应用的一种有前途的材料。研究发现，过渡金属掺杂可以在“假”金刚石中诱导室温铁磁性。基于密度泛函理论的理论分析证实了实验测量结果，表明 Mn 和 Ni 掺杂 ZrO2 薄膜的磁矩远大于 Fe 或 Co 掺杂 ZrO2 薄膜的磁矩。最重要的是，我们的计算证实，与 Co 和 Fe 掺杂的 ZrO2 相比，Mn 和 Ni 掺杂的 ZrO2 呈现铁磁基态，有利于反铁磁基态。
