The alteration properties of BiFeO₃ doped (K_0.5Na_0.5)NbO₃ (KNN–BF) were investigated and focused on elucidating the origin of its modification. The crystal structure to have transformed from the initial orthorhombic to tetragonal shape at dopant amount x ≥ 0.025. Moreover, the XANES Fe K-edge analysis revealed the quadrupole transition 1s→3d, dipole transition 1s→4p, and edge energy E₀ of samples were higher than those of Fe₂O₃ after which the oxidation state of Fe was found to be a mixture of 3+ and 4+. The defects, however, affected the properties by producing relaxor due to the polar nanoregions (PNRs) besides the presence of lattice dipole. Furthermore, the KNN was altered to ferromagnetic possessing Ms up to 0.0076 emu g⁻¹ for x = 0.075 originating from the unpaired electron of Fe ions which was influenced by the interaction Fe³⁺-O^2--Fe⁴⁺ and Nb⁵⁺-${\text{V}}_{\text{O}}^{••}$-Fe^3+/4+ in the B–O–B octahedron chain.

研究了BiFeO ₃掺杂的（K _0.5 Na _0.5）NbO ₃（KNN-BF）的改变性质，并着重于阐明其修饰的起源。的晶体结构已经从最初的斜方晶系，在掺杂量转化为四边形X  ≥0.025。此外，XANES Fe K-edge分析显示样品的四极转变1s→3d，偶极转变1s→4p，样品的边缘能E ₀高于Fe ₂ O _3。之后，发现Fe的氧化态为3+和4+的混合物。但是，除了存在晶格偶极子外，由于极性纳米区域（PNR），缺陷还会通过产生弛豫来影响性能。此外，由于Fe ³⁺ -O ^2-- Fe ⁴⁺和Nb ⁵⁺的相互作用，Fe的不成对电子引起KNN改变为Ms高达0.0076 emu g ^-1的铁磁，x = 0.075。--${\text{伏特}}_{\text{Ø}}^{••}$B–O–B八面体链中的-Fe ^{3 + / 4 +}。