High-field magnetization in (Cr1-xNix)2 As with x=0.5 and 0.7

The magnetization M for (Cr1-xNix)2As with x=0.5 and 0.7 has been measured as a function of magnetic field H up to 36 T in the temperature (T) range 1.3 K ≤ T ≤ 210 K. In (Cr0.5Ni0.5)2As, M against H at 77 and 130 K tends to saturate above about 2 T, while at 210 K it gradually increases. No spontaneous magnetization is observed in the temperature range down to 1.3 K in (Cr0.3Ni0.7)2As. In this sample, an abrupt increase in M against H accompanying a hysteresis loop is observed at lower temperatures and low H range. The magnitude of hysteresis loop decreases with increasing T up to about 10 K, while the increasing behavior of M is maintained up to about 40 K. The obtained results are briefly discussed from the viewpoint of band magnetism.