CoFe2O4 nanoparticles were prepared by the co-precipitation method, the structural properties were performed using X-Ray Diffraction (DRX) in the goal to prove the success of Cobalt ferrite formation and determine crystal parameters. The size and morphological study were building using Scanning Electron Microscopy (SEM). The magnetic properties were carried using MPMS SQUID device. The CoFe2O4 nanoparticles present a ferromagnetic behavior below their transition temperature and values of 3 µB of total magnetic moment were achieved under magnetic field of 5 T. Based on the full-potential linearized augmented plane wave (FP-LAPW) method, with the generalized gradient and GGA-PBE approximation, the electronic structure and local magnetic moment were calculated. This theoretical study contributed to a better understanding the role of magnetic interaction sin CoFe2O4 spinel ferrites. Moreover, the theoretical magnetic properties of CoFe2O4 show a good agreement with the experimental results obtained.

中文翻译：

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CoFe2O4尖晶石铁氧体磁性起源的实验和第一性原理研究

CoFe2O4 纳米粒子是通过共沉淀法制备的，结构特性是使用 X 射线衍射 (DRX) 进行的，目的是证明钴铁氧体形成的成功并确定晶体参数。使用扫描电子显微镜 (SEM) 进行尺寸和形态研究。使用 MPMS SQUID 设备承载磁性。CoFe2O4 纳米粒子在其转变温度以下表现出铁磁行为，并且在 5 T 的磁场下实现了 3 µB 的总磁矩值。 基于全电位线性增强平面波 (FP-LAPW) 方法，具有广义梯度和 GGA-PBE 近似，计算电子结构和局部磁矩。这项理论研究有助于更好地理解磁相互作用 sin CoFe2O4 尖晶石铁氧体的作用。此外，CoFe2O4 的理论磁性能与实验结果非常吻合。