In the present study, we report a detail investigation on the effect of insolubility of Ag 40% doping on the structural and magnetic properties of LCMO-Ag compound prepared by solid-state reaction. The analysis of X-ray diffraction for our samples using Rietveld refinement showed that they crystallize in the orthorhombic structure with Pnma space group. We have shown that this compound has a secondary phase (Ag metallic phase). The detailed analyses of Hirshfeld surface and fingerprint plots provide insight into the nature of intermolecular interactions in the title compound. Magnetization measurements versus temperature at different magnetic fields have shown the presence of two magnetic transitions. This result was confirmed previously in the crystallographic study. This phase exhibits magnetic properties, which has a Curie temperature (Tc) which is lower than the Curie temperature of the FM-PM transition. The critical properties of perovskite manganite LCMO-Ag around of transition with Tc = 230K is investigated through various techniques such as modified Arrott plot, Kouvel-Fisher method, and critical isotherm analysis. Moreover, the critical exponents also obeyed the single scaling equation of M(H, ɛ)|ɛ|^-β = f_±(H|ɛ|^-(β+γ). We find that the critical exponent for LCMO-Ag is close to that theoretically predicted for mean field tricritical model.

在本研究中，我们报告了对40％Ag的不溶性对通过固相反应制备的LCMO-Ag化合物的结构和磁性的影响的详细调查。使用Rietveld精炼对我们的样品进行的X射线衍射分析表明，它们在具有Pnma空间群的正交结构中结晶。我们已经证明该化合物具有次级相（Ag金属相）。Hirshfeld表面和指纹图的详细分析提供了对标题化合物中分子间相互作用性质的了解。在不同磁场下磁化强度与温度的关系表明存在两个磁跃迁。该结果先前在晶体学研究中得到证实。该相具有磁性，其居里温度（Tc）低于FM-PM转换的居里温度。通过多种技术研究了钙钛矿锰矿LCMO-Ag在Tc = 230K附近转变的临界性质，例如改良的阿罗特图，Kouvel-Fisher方法和临界等温线分析。此外，关键指数还服从于M（H，  ɛ）| ɛ | ^{- β}  =  ˚F _±（ħ | ɛ | ^{- （β + γ）}。我们发现，对LCMO银临界指数接近于理论上预测的平均场三临界模型。