Abstract Spherical magnetic Fe3O4 nanoparticles with different Nd doping amounts were successfully prepared using a simple hydrothermal method. The products were characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), dynamic laser scattering particle size (DLS), and vibrating sample magnetometer (VSM) analysis. Results showed that the spherical nanoparticles of pure Fe3O4, pure Nd2O3, and Nd-Fe3O4 were confirmed by XRD and TEM. The size of the prepared nanoparticles decreased first and then increased with increasing Nd doping amount by dynamic laser scattering. In addition, magnetic parameters, including saturation magnetization, remanent magnetization, and coercivity of Fe3O4 nanoparticles with different doping ratios of Nd, were analyzed by VSM.

中文翻译：

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Fe3O4纳米粒子中Nd掺杂对磁性的影响

摘要 采用简单的水热法成功制备了不同Nd掺杂量的球形磁性Fe3O4纳米粒子。通过粉末X射线衍射(XRD)、透射电子显微镜(TEM)、动态激光散射粒度(DLS)和振动样品磁强计(VSM)分析对产物进行表征。结果表明，XRD 和 TEM 证实了纯 Fe3O4、纯 Nd2O3 和 Nd-Fe3O4 的球形纳米粒子。通过动态激光散射，制备的纳米颗粒的尺寸随着Nd掺杂量的增加而先减小后增大。此外，通过VSM分析了不同Nd掺杂比例的Fe3O4纳米颗粒的饱和磁化强度、剩磁强度和矫顽力等磁参数。