Spin reorientation in Er1−xYxCo10Mo2 and ErCo10−yNiyMo2 compounds

Abstract Er 1− x Y x Co 10 Mo 2 ( x =0, 0.2, 0.4, 0.6, and 0.8) and ErCo 10− y Ni y Mo 2 ( y =0, 1, 2, and 3) compounds have been studied in magnetization and susceptibility measurements. Interesting magnetization curves at selected temperatures have been observed. The results show that both these systems undergo a spin reorientation of the axis-to-plane type (referred to decreasing temperature). The spin-reorientation temperature, T SR , is found to decrease not only with increasing Y content in the Er 1− x Y x Co 10 Mo 2 compounds but also with increasing Ni concentration in the ErCo 10− y Ni y Mo 2 compounds. The causes of the observed concentration dependence of T SR are discussed.