We report on high-temperature crystallographic structure, magnetic and physical properties of chemically B-site disordered lead-bismuth iron tungstate, (PFW)_1−x(BFO)_x (which can be written as Pb_0.8Bi_0.2Fe_0.728W_0.264O₃ (0.8PFW–0.2BFO) for x = 0.2 and Pb_0.7Bi_0.3Fe_0.762W_0.231O₃ (0.7PFW–0.3BFO) for x = 0.3) or PBFW), solid solutions through neutron diffraction (ND), magnetization, electron paramagnetic resonance, and Mössbauer spectroscopic studies. From the high temperature magnetic susceptibility measurement, it is observed that increase antiferromagnetic to paramagnetic phase transition around T_N = 435 K (Pb_0.8Bi_0.2Fe_0.728W_0.264O₃) and 504 K (Pb_0.7Bi_0.3Fe_0.762W_0.231O₃), compared to pure PFW. Room-temperature crystallographic study confirms the formation of pseudo cubic structure with Pm-3m space group, whereas the magnetic structure is commensurate G-type antiferromagnetic ordering. The obtained temperature dependent structural parameters from the ND, evidenced to existence of strong spin-lattice coupling around T_N for both the compounds. The discontinuity in the Pb/Bi–O bond length around ferroelectric transition (T_C) indicates the presence of magnetoelectric coupling. Interestingly, microscopic 1:1 B-site ordered nanoclusters of PBFW exhibits the ferrimagnetic clusters along with antiferromagnetic order and it observed through the opening of M vs H hysteresis curves in the lower field regime. The EPR and Mössbauer spectroscopic studies well support the magnetic property and also reveal the Fe⁺³ state, and the weak signal in EPR and broader linewidth in the Mössbauer spectra exhibit the B-site disorderliness.

我们报告了化学B位无序铅铋钨酸钨（PFW）_{1- x}（BFO）_x（可以写成Pb _0.8 Bi _0.2 Fe _0.728 W _0.264 O的高温晶体结构，磁性和物理性质₃（0.8PFW-0.2BFO）为X  = 0.2和Pb _0.7铋_0.3的Fe _0.762 W ^ _0.231 ø ₃（0.7PFW-0.3BFO）为X = 0.3）或PBFW），通过中子衍射（ND）的固溶，磁化，电子顺磁共振和Mössbauer光谱学研究。通过高温磁化率测量，可以观察到在T _N  = 435 K（Pb _0.8 Bi _0.2 Fe _0.728 W _0.264 O ₃）和504 K（Pb _0.7 Bi _0.3 Fe _{0.3Fe 0.762} W _0.231 O ₃）附近反铁磁至顺磁相变增加。），相比纯PFW。室温晶体学研究证实了Pm-3m的拟立方结构的形成空间组，而磁性结构是相称的G型反铁磁有序。从ND所获得的依赖于温度的结构参数，证明围绕强的自旋-晶格耦合的存在Ť _Ñ两者的化合物。铁电跃迁（T _C）周围的Pb / Bi-O键长度不连续表明存在磁电耦合。有趣的是，PBFW的微观1：1 B位置有序纳米团簇显示出亚铁磁簇和反铁磁序，并且通过M对H的开放观察到在低场状态下的磁滞曲线。EPR和Mössbauer光谱研究很好地支持了磁性，并且还揭示了Fe ⁺³态，EPR中的弱信号和Mössbauer光谱中较宽的线宽都显示出B位无序。