Abstract In the present study, the synthesis of a new ternary intermetallic compound Tb2Ni0.90Si2.94 has been reported. The detailed studies on structure, static and dynamical magnetic properties of the compound have been investigated by means of powder x-ray diffraction, compositional analysis, dc & ac magnetization, non-equilibrium dynamics, heat capacity and neutron diffraction measurements. The dc & ac magnetic susceptibility reveal that the compound undergoes spin cluster-glass behaviour below 9.9 K. The frequency dependence of the freezing temperature have been analysed on the basis of dynamic scaling laws such as power-law divergence and Vogel-Fulcher law, which further confirm the cluster-glass state formation for the compound. A detailed study on non-equilibrium dynamical behaviour associated with cluster-glass state has been carried out through magnetic relaxation behaviour along with magnetic memory effect in zero-field-cooled (ZFC) as well as field-cooled (FC) conditions and associated aging effect. The zero-field neutron diffraction study reveals the presence of a spatially limited antiferromagnetic phase in addition to the magnetically frustrated cluster-glass state. This result has also been supported through zero-field heat capacity studies. The variation in local electronic environment among the magnetic rare-earth ions caused by the structural disorder associated with Ni/Si ions have been argued to be responsible for the coexistence of different magnetic phases.

中文翻译：

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团簇玻璃化合物 Tb2Ni0.90Si2.94 中空间受限的反铁磁有序

摘要 本研究报道了一种新型三元金属间化合物Tb2Ni0.90Si2.94 的合成。通过粉末 X 射线衍射、成分分析、直流和交流磁化、非平衡动力学、热容和中子衍射测量，对该化合物的结构、静态和动态磁性能进行了详细研究。直流和交流磁化率表明该化合物在低于 9.9 K 时发生自旋簇玻璃行为。 根据动态标度定律，如幂律发散和 Vogel-Fulcher 定律，分析了冻结温度的频率依赖性，其中进一步证实了该化合物的簇玻璃态形成。通过磁弛豫行为以及零场冷却 (ZFC) 以及场冷却 (FC) 条件和相关老化条件下的磁记忆效应，对与团簇玻璃态相关的非平衡动力学行为进行了详细研究影响。零场中子衍射研究表明，除了受磁抑制的簇玻璃态外，还存在空间受限的反铁磁相。这一结果也得到了零场热容量研究的支持。由与 Ni/Si 离子相关的结构无序引起的磁性稀土离子之间局部电子环境的变化被认为是不同磁性相共存的原因。