Abstract In this paper, the effect of the non-magnetic and magnetic trivalent ion substitutions on structure features and magnetic properties of Bi1-x(Gd or Y)xFe0.95Mn0.05O3 (x = 0.00, 0.01, 0.02, 0.03) nanoparticles have been investigated. The prepared samples were analyzed using the techniques of X-ray diffraction, vibrating sample magnetometer, and scanning electron microscopy (SEM) measurements. Structural analysis of Bi1-x(Gd or Y)xFe0.95Mn0.05O3 nanoparticles shows that a phase transition from rhombohedral (space group R3c) to cubic (space group Pm 3 ¯ m) occurs at x = 0.02 . SEM images show the average particle size of 50–100 nm which decreases with increasing the Gd/Y concentration. The magnetic properties of Gd- and Y-substituted samples such as the coercive field ( H C ), remanent magnetization ( M r ) and saturation magnetization ( M s ) indicate a ferrimagnetic behavior compared to the antiferromagnetic behavior of samples BiFeO3 and BiFe0.95Mn0.05O3. The observed magnetic behavior has been attributed to the observed structural phase transition and the reduction of particle size with the substitution of Gd3+ and Y3+ ions.

中文翻译：

---

非磁性和磁性三价稀土离子取代对铁氧体铋性能影响的比较研究：晶体结构与物理性能的相关性

摘要 本文研究了非磁性和磁性三价离子置换对Bi1-x(Gd or Y)xFe0.95Mn0.05O3 (x = 0.00, 0.01, 0.02, 0.03)纳米粒子结构特征和磁性能的影响。被调查。使用 X 射线衍射、振动样品磁强计和扫描电子显微镜 (SEM) 测量技术分析制备的样品。Bi1-x(Gd 或 Y)xFe0.95Mn0.05O3 纳米粒子的结构分析表明，从菱面体（空间群 R3c）到立方体（空间群 Pm 3 ¯ m）的相变发生在 x = 0.02 处。SEM 图像显示平均粒径为 50-100 nm，随着 Gd/Y 浓度的增加而减小。Gd-和Y-取代样品的磁性，如矫顽场（HC），与样品 BiFeO3 和 BiFe0.95Mn0.05O3 的反铁磁行为相比，剩余磁化强度 (Mr) 和饱和磁化强度 (Ms) 表明亚铁磁行为。观察到的磁性行为归因于观察到的结构相变和颗粒尺寸随着 Gd3+ 和 Y3+ 离子的取代而减小。