We investigate the detailed analysis of the magnetic properties in a series of Pr_1–x Sm _x FeO₃ single crystals from x = 0 to 1 with an interval of 0.1. Doping controlled spin reorientation transition temperature T _SR Γ₄ (G _x , A _y , F _z ) to Γ₂ (F _x , C _y , G _z ) covers a wide temperature range including room temperature. A ‘butterfly’-shape type-I spin switching with 180 magnetization reversal occurs below and above the magnetization compensation points in x = 0.4 to 0.8 compounds. Interestingly, in Pr_0.6Sm_0.4FeO₃ single crystal, we find an inadequate spin reorientation transition accompanied by uncompleted type-I spin switching in the temperature region from 138 to 174K. Furthermore, a type-II spin switching appears at 23K, as evidenced from the magnetization curve in field-cooled-cooling (FCC) mode initially bifurcate from zero-field-cooled (ZFC) magnetization curve at 40K and finally drops back to coincide the ZFC magnetization value at 23K. Our current research reveals a strong and complex competition between Pr³⁺–Fe³⁺ and Sm³⁺–Fe³⁺ exchange interactions and more importantly renders a window to design spintronic device materials for future potential applications.

我们研究了一系列 Pr _{1– x} Sm _x FeO ₃单晶的磁性的详细分析，从x = 0 到 1，间隔为 0.1。掺杂控制的自旋重定向转变温度T _SR Γ ₄ ( G _x , A _y , F _z ) 到 Γ ₂ ( F _x , C _y , G _z ) 涵盖广泛的温度范围，包括室温。在x = 0.4 到 0.8 的化合物中，在磁化补偿点的下方和上方发生了具有 180 度磁化反转的“蝴蝶”形 I 型自旋切换。有趣的是，在 Pr _0.6 Sm _0.4 FeO ₃在单晶中，我们发现在 138 到 174K 的温度范围内，自旋重定向转变不充分，伴随着未完成的 I 型自旋转换。此外，II 型自旋切换出现在 23K，从场冷冷却 (FCC) 模式中的磁化曲线证明，最初从 40K 处的零场冷却 (ZFC) 磁化曲线分叉，最后回落到与23K 时的 ZFC 磁化值。我们目前的研究揭示了 Pr ³⁺ –Fe ³⁺和 Sm ³⁺ –Fe ³⁺交换相互作用之间强大而复杂的竞争，更重要的是为设计用于未来潜在应用的自旋电子器件材料提供了一个窗口。