We report an inelastic neutron scattering study on the magnetic excitations of ${\mathrm{Pr}}_2{\mathrm{NiO}}_{4+\delta }$ ($\delta \sim 0.24\pm 0.01$) at $T=10$ K. Spin stripe ordering becomes pronounced below $\sim 220$ K with an incommensurability $\epsilon \approx 0.346$, and a strong influence of interstitial oxygen is identified on establishing a long-range spin stripe ordering. Apart from the Goldstone modes emerging from the magnetic satellites (${\mathbf{q}}_m$), multiple homologous modes are observed along the spin stripe modulation separated by $\mathrm{\Delta }{\mathbf{q}}_m\approx 0.076$ in reciprocal lattice units, which is interpreted by the internal periodicity of the long-range ordered discommensurated spin stripes.

中文翻译：

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远距离条纹有序Pr2NiO4 +δ的磁激发

我们报告了关于中子的磁激发的非弹性中子散射研究 ${镨}_{\mathrm{2个}}{\mathrm{氧化镍}}_{4+\delta }$ （$\delta 〜0.24\pm 0.01$） 在 $Ť=10$ K.自旋条纹的排序在下面变得很明显 $〜220$ 不可通约性的K $\epsilon \approx 0.346$，并且可以确定间隙氧对建立长程自旋条纹有序影响很大。除了从磁卫星中出现的戈德斯通模式（${\mathbf{q}}_{米}$），沿着自旋条纹调制观察到多个同源模式，由 $\mathrm{\Delta }{\mathbf{q}}_{米}\approx 0.076$ 以互易的晶格单位表示，这由远距离有序不对称自旋条纹的内部周期性来解释。