Magnetic properties of intermetallic MnMn_0.25Sb crystallizing in the NiAs-type hexagonal structure are reported. A spin-glass transition at T_f ≈ 10.7 K was identified from Ac susceptibility measurements. The value of the Mydosh parameter $(\phi \approx 0.06)$. was further indicative of cluster spin glass like state. The frequency dependence of T_f was investigated by critical slowing-down model and Vogel-Fulcher law. The characteristic time constant of ${\tau }_0^{\ast }\approx 0.18\times {10}^{-7}s$ was analysed using power-law for a single spin-flip and a critical exponent of $zv=4.37\pm 0.14$. The characteristic time constant was obtained from the Vogel-Fulcher law for a single spin-flip ${\tau }_0\approx 7.96\times {10}^{-8}s$, and $T_0=6.49\pm 0.21K$. The cluster spin-glass behaviour in the current system is due to the existence of both competing interactions and atomic disorder at 2d site.

报道了在NiAs型六方结构中结晶的金属间Mn Mn _0.25 Sb的磁性。在一种自旋玻璃化转变Ť _˚F  ≈10.7ķ从交流磁化率的测量被确定。Mydosh参数的值$（\phi \approx 0.06）$。进一步表明簇状自旋玻璃状状态。利用临界减速模型和Vogel-Fulcher定律研究了T _f的频率依赖性。的特征时间常数${\tau }_0^{\ast }\approx 0.18\times {10}^{-7}s$ 使用幂定律分析了单个自旋翻转和的临界指数 $žv=4.37\pm 0.14$。特征时间常数是从Vogel-Fulcher定律获得的，用于单次自旋翻转${\tau }_0\approx 7.96\times {10}^{-8}s$和 ${Ť}_0=6.49\pm 0.21ķ$。当前系统中的团簇自旋玻璃行为是由于2d位置同时存在竞争性相互作用和原子无序。