Abstract The structural, optical and nuclear quadrupole resonance (NQR) measurements of PbMnI2 alloys were carried out. This allows us to study the peculiarities of the formation of such alloys. It was found that pure PbI2 and Pb1-XMnXI2 crystals with X = (0.03–0.05) have the phase of 2H-polytype. It was shown that the investigated alloys can be presented as the crystal regions of Pb1-XMnXI2 solid solutions, embedded in PbI2 crystal matrix. These formations can be considered as platelet-shaped nanoparticles with a surface of several microns and a thickness of several tens of nm. Thus, PbMnI2 alloys are heterogeneous PbI2–PbMnI2 nanocomposites. The results of NQR spectra measurements also show that Mn2+ ions preferably replace Pb2+ ions in the crystalline layers. Here, the local deformations occur because the radii of Pb2+ and Mn2+ ions differ significantly. The broadening of optical and NQR lines is due to the presence of both these deformations and the crystal field fluctuations, which are characteristic of semiconductor solid solutions.

中文翻译：

---

PbMnI2 合金的形成：结构、光致发光和核四极共振研究

摘要 对 PbMnI2 合金进行了结构、光学和核四极共振 (NQR) 测量。这使我们能够研究此类合金形成的特性。发现 X = (0.03–0.05) 的纯 PbI2 和 Pb1-XMnXI2 晶体具有 2H-多型相。结果表明，所研究的合金可以呈现为 Pb1-XMnXI2 固溶体的晶体区域，嵌入 PbI2 晶体基质中。这些结构可以被认为是具有几微米表面和几十纳米厚度的片状纳米颗粒。因此，PbMnI2 合金是异质的 PbI2-PbMnI2 纳米复合材料。NQR 光谱测量的结果还表明，Mn2+ 离子优选替代结晶层中的 Pb2+ 离子。这里，局部变形的发生是因为 Pb2+ 和 Mn2+ 离子的半径显着不同。光学和 NQR 线的加宽是由于这些变形和晶体场波动的存在，这是半导体固溶体的特征。