A new solid solution of composition Pb_2-xBi_xMnO₄ (0 ≤ x ≤ 0.3) has been synthesised by solid-state reaction at 730 °C. The crystal structures have been investigated using X-ray and neutron diffraction. The replacement of Pb²⁺ by Bi³⁺ ions induces reduction of Mn⁴⁺ to Mn³⁺ with an increase in lattice volume. The Bi³⁺ ions preferentially occupy the five-coordinated rather than four-coordinated Pb sites. Magnetic measurements and neutron diffraction reveal antiferromagnetic transitions in these materials. A clear increase in magnetic frustration and suppression of magnetic order is evidenced for Pb_1.7Bi_0.3MnO₄ through the long-range order of a small ~1.0 µ_B AFM moment below T_N.

通过在730 °C的固相反应合成了组成为Pb _2-x Bi _x MnO ₄（0≤x≤0.3）的新固溶体 。已经使用X射线和中子衍射研究了晶体结构。用Bi ³⁺离子替代Pb ^2+会导致Mn ⁴⁺还原为Mn ³⁺，同时晶格体积增加。Bi ³⁺离子优先占据五配位而不是四配位的Pb位。磁性测量和中子衍射揭示了这些材料中的反铁磁跃迁。铅_1.7证明了磁阻的明显增加和磁序的抑制Bi _0.3 MnO ₄通过一个比T _N小〜1.0 µ _B AFM矩的长程有序。