Magnetic properties of compounds (Mn,Cr)1+xSb,V1+xSb and (Mn,V)1+xSb with B8-type structures

Investigations of the compounds (Mn,Cr)_1+xSb, V_1+xSb and (Mn,V)_1+xSb with B8-type structures are described. The homogeneity ranges of (Mn,Cr)_1+xSb and (Mn,V)_1+xSb shift to metal-richer compositions with increasing temperature. These compounds are ferrimagnetic. The magnetic-ordering temperature and the spontaneous magnetization decrease with increasing $\text{Cr}\text{Mn}$ and $\text{V}\text{Mn}$ ratios, respectively.The homogeneity range of the high-temperature phase V_1+xSb is situated around the composition x = 0.40. V_1.40Sb shows nearly temperature-independent (Pauli) paramagnetism (except at low temperature).