Synthesis of YFeO-YFeO Heterogeneous Structure Magnetic Nanomaterials and Preparation of Nanofibers by Coprecipitation Method.

The design and fabrication of yttrium iron oxide-based magnetic nanomaterials play an indispensable role in microelectronic-related fields. The bottleneck still remains, including limited reproducibility and the inability to control the size of the resulting material. In this study, a straightforward coprecipitation method was firstly used for the production of heterogeneous YFeO-YFeO composite with (NH)CO as the precipitant. Under optimized conditions, the obtained YFeO-YFeO nanoparticles exhibit high crystallinity and ferromagnetic properties at room temperature, and its saturation magnetization strength (Ms) reached 11.927 emu·g. Meanwhile, the particle size can be achieved at approximately 14.7 nm. The compact heterojunction between the yttrium iron oxide components gives rise to the obvious ferromagnetic property. Subsequently, YFeO-YFeO nanoparticles were taken as the raw material for preparing flexible [(YFeO-YFeO)/PVP] nanofibers by electrospinning technology. By changing the proportion of magnetic particles in the nanofibers, the magnetic strength can be regulated. The integration between magnetism and the preparation of nanofiber membranes is realized. The encapsulation of magnetic particles in the nanofibers avoids not only aggregation but also the direct contact with the impurity, which promotes practicability and recycle life.