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Room temperature ferromagnetic pure ZnO

机译:室温铁磁纯ZnO

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Pure ZnO films were prepared by pulsed laser deposition on oxidized Si substrates under different oxygen pressure and substrate temperature. Clear room temperature ferromagnetism has been observed in the ZnO film prepared under high vacuum and room temperature. The observation of anomalous Hall effect confirms the intrinsic nature of the ferromagnetism. The photoluminescence and X-ray photoelectron spectroscopy spectra show the high concentration of oxygen vacancies in the ferromagnetic ZnO film. Our results clearly demonstrate the ferromagnetic contribution of the oxygen vacancies mediated by the spin polarized electrons hopping between discrete states in pure ZnO.
机译:在不同的氧气压力和衬底温度下,通过脉冲激光沉积在氧化的Si衬底上制备纯ZnO薄膜。在高真空和室温下制备的ZnO薄膜中观察到了清晰的室温铁磁性。霍尔效应反常的观察证实了铁磁性的内在本质。光致发光和X射线光电子能谱显示铁磁性ZnO薄膜中氧空位的浓度很高。我们的结果清楚地证明了纯ZnO中离散状态之间跳跃的自旋极化电子在介导的氧空位中的铁磁作用。

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