Abstract Room temperature ferromagnetism (RTFM) in Ni/Co codoped CeO2 nanostructures has been studied. The samples are synthesized by hydrothermal method and further characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), Raman spectroscopy (RS), photoluminescence (PL) spectroscopy and vibrating sample magnetometer (VSM) measurements. The undoped CeO2 sample shows RTFM and a consistent enhancement in its RTFM is observed after doping. The Ni (5%)-Co (5%) codoped CeO2 nanostructures revealed interestingly, highest RTFM. The origin of RTFM in all CeO2 samples is explained by electronic density of states and magnetic moments calculated using density functional theory (DFT).

中文翻译：

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镍钴共掺杂 CeO 2 纳米结构中室温铁磁性异常增强的实验和理论研究

摘要 研究了 Ni/Co 共掺杂 CeO2 纳米结构中的室温铁磁性 (RTFM)。样品采用水热法合成，并通过 X 射线衍射 (XRD)、透射电子显微镜 (TEM)、能量色散 X 射线光谱 (EDX)、拉曼光谱 (RS)、光致发光 (PL) 光谱和振动样品进一步表征磁力计 (VSM) 测量。未掺杂的 CeO2 样品显示出 RTFM，并且在掺杂后观察到其 RTFM 的持续增强。有趣的是，Ni (5%)-Co (5%) 共掺杂的 CeO2 纳米结构显示出最高的 RTFM。所有 CeO2 样品中 RTFM 的起源可以通过使用密度泛函理论 (DFT) 计算的电子态密度和磁矩来解释。