For achieving tunable saturation magnetization and line width, different cations were doped into the YIG-based garnets, which the standard molecular formula could be expressed as A₃[Fe_2−xM_x](Fe_3−yN_y)O₁₂. Most researchers have reported a single rule of one element doping (x or y) on its magnetic properties. However, the cooperation effect of x+y to the magnetic contribution was not clearly clarified. In this work, multi-doped bismuth-iron garnets {Bi_0.84Ca_2.16}[Fe_2−xIn_x](Fe_3−yV_y)O₁₂ (x=0.72–0.14 and y=1.24–1.38) with low saturation magnetizations (4πM _s=200–600 Gs at 298 K) were prepared by a conventional fluxing agent method. The cooperation effect of In³⁺ and V⁵⁺ co-doped into bismuth-iron garnets (BIG) on their structures and magnetic properties were systematically investigated using XPS, TEM and VSM. It could be found that the total doped concentration (x+y) was decreasing regardless of the increasing V concentration (y) and decreasing In concentration (x). As-synthesized BIG presented a well single-crystal structure, and the lattice spacing was decreasing with the decrease of x+y in accompanying with the transition of dislocations from point defects to edge dislocations. Both linear increase of Curie temperature and 4πM _s with the decrease of x+y was revealed. The mechanism could be attributed that the doped non-magnetic ions could reduce the average nearest-neighbor coordination irons for oxygen ions and weaken the anti-ferromagnetic super-exchange interactions among the magnetic ions within the structure, namely dilution effect. By comparison, the total concentraions were higher than that of previous works, which the tailorable 4πM _s of ferrite was not reported. Here we revealed the controllable 4πM _s with higher total concentrations (x+y≥1.52). These findings will be provided more opportunities for applications in microwave devices.

为了实现可调的饱和磁化强度和线宽，将不同的阳离子掺杂到基于YIG的石榴石中，其标准分子式可以表示为A ₃ [Fe _2-x M _x ]（Fe _3-y N _y）O ₁₂。大多数研究人员报告了一种元素掺杂（x或y）对其磁性能的单一规则。但是，x + y对磁性贡献的协同作用尚未明确。在这项工作中，多掺杂铋铁石榴石{Bi _0.84 Ca _2.16 } [Fe _2-x In _x ]（Fe _3-y V _y）O ₁₂具有低饱和磁化强度（4（X = 0.72-0.14且y = 1.24-1.38）πM _小号= 200-600 GS在298 K）通过常规助熔剂方法制备。用XPS，TEM和VSM系统地研究了掺入铋铁石榴石（BIG）中的In ³⁺和V ⁵⁺的协同作用对它们的结构和磁性的影响。可以发现，总掺杂浓度（x + y）减小，而与V浓度（y）增大和In浓度（x）减小无关。合成的BIG呈现出良好的单晶结构，并且随着位错从点缺陷向边缘位错的过渡，晶格间距随着x + y的减小而减小。居里温度和4的线性增加πM _小号，其中x + y的下降被揭露。该机理可以归因于掺杂的非磁性离子可以减少氧离子的平均最近邻配位铁，并减弱结构内磁性离子之间的反铁磁超交换相互作用，即稀释效应。相比之下，总concentraions比以前的作品，其裁剪4更高πM _小号铁素体没有报道。在这里，我们揭示了可控4 πM _小号具有更高的总浓度（X +y≥1.52）。这些发现将为在微波设备中的应用提供更多的机会。