标题： 通过穆斯堡尔谱研究揭示 Ruddlesden-Popper 双层镍氧化物中的磁性演化 显示英文标题

标题： Evolution of magnetism in Ruddlesden-Popper bilayer nickelate revealed by muon spin relaxation

摘要： 此处我们报告了在常压下对掺杂Pr的La$_{1.9}$Pr$_{1.1}$Ni$_2$O$_{6.97}$和氧缺位的La$_3$Ni$_2$O$_{6.63}$多晶材料进行的正穆斯堡器自旋弛豫研究。 零场 $\mu^+$SR 实验揭示了在 La$_{1.9}$Pr$_{1.1}$Ni$_2$O$_{6.97}$ 中存在体长程磁序 with $T_{N}=161\ \rm{K}$，而 La$_3$Ni$_2$O$_{6.63}$ 展现出短程磁基态 with $T_N=30\ \rm{K}$。 该材料La$_{1.9}$Pr$_{1.1}$Ni$_2$O$_{6.97}$通过弱横向场$\mu^+$SR揭示的磁转变宽度比La$_3$Ni$_2$O$_{6.92}$更窄。 我们的$\mu^+$SR 实验结果提供了在常压下 Ruddlesden-Popper 双层镍氧化物中磁性与结构完美度之间相关性的全面视角。 显示英文摘要

摘要： Here we report the positive muon spin relaxation study on Pr-doped La$_{1.9}$Pr$_{1.1}$Ni$_2$O$_{6.97}$ and oxygen-deficient La$_3$Ni$_2$O$_{6.63}$ polycrystalline under ambient pressure. Zero-field $\mu^+$SR experiments reveal the existence of bulk long-range magnetic order in La$_{1.9}$Pr$_{1.1}$Ni$_2$O$_{6.97}$ with $T_{N}=161\ \rm{K}$, while La$_3$Ni$_2$O$_{6.63}$ exhibits a short-range magnetic ground state with $T_N=30\ \rm{K}$. The magnetic transition width of La$_{1.9}$Pr$_{1.1}$Ni$_2$O$_{6.97}$ revealed by weak-transverse-field $\mu^+$SR is narrower compared to La$_3$Ni$_2$O$_{6.92}$. Our $\mu^+$SR experiment results provide a comprehensive view on the correlation between magnetism and structure perfection in Ruddlesden-Popper bilayer nickelates under ambient pressure.