Here we present the Mössbauer study of the combined magnetic and electrical hyperfine interactions of the probe Fe nuclei localized in the hexagonal manganite ScMnO. The hyperfine interactions were measured in the temperature range where ScMnO demonstrates spin ordering: 15 K < < (∼ 130 K). By analyzing the hyperfine parameters of Fe nuclei, we evaluated the oxidation state of the iron ions, their local crystal environment, and the orientation of the magnetic moments μ in the structure of ScMnFeO at <<. The temperature-dependent evolution of Zeeman structures in Mössbauer spectra was analyzed using the stochastic relaxation model, and indicates the presence of frustration of the superexchange interactions Fe−O−Mn. The temperature dependence of the hyperfine magnetic field () was described using critical indices, whose values reflect the reduced dimensionality of the magnetic system under study. It was shown that the observed sharp temperature-dependent change of the quadrupole shift of the Zeeman structure components may be attributed to the spin reorientation process, resulting in antiferromagnetism with a weak ferromagnetic component.

中文翻译：

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六方锰矿 ScMnO3 中探针 57Fe 原子的磁超精细相互作用


在这里，我们提出了穆斯堡尔研究，对位于六方锰矿 ScMnO 中的探针 Fe 核的磁电超精细相互作用进行了研究。超精细相互作用是在 ScMnO 表现出自旋有序的温度范围内测量的：15K < < (∼ 130K)。通过分析 Fe 核的超精细参数，我们评估了铁离子的氧化态、局部晶体环境以及 ScMnFeO 结构中 << 处磁矩 μ 的方向。使用随机弛豫模型分析了穆斯堡尔谱中塞曼结构的温度依赖性演化，并表明超交换相互作用 Fe−O−Mn 受阻的存在。超精细磁场 () 的温度依赖性是使用临界指数来描述的，其值反映了所研究的磁系统的降维性。结果表明，观察到的塞曼结构成分四极位移的急剧温度依赖性变化可能归因于自旋重新取向过程，导致具有弱铁磁成分的反铁磁性。