Ferrimagnetism in Tb3Co8Sn4 intermetallic compound

AC and DC magnetic measurements were performed on the ternary intermetallic phase Tb3Co8Sn4. The compound shows a ferrimagnetic transition at T-c=91 K. From the imaginary part of the AC susceptibility a second broad peak was detected at T-s=28 R and ascribed to a transition to a spin glass state. Zero field cooled (ZFC) and field cooled (FC) magnetization measurements at mu H-0=0.05 Tesla (T) confirmed the reentrant spin lass state below 30 it. The hysteresis cycle, obtained from magnetization measurements at 5 KI allows to obtain the remanence (B-r=0.43 T) and the coercive field (H-c=159.2 kA/m). The experimental data were analysed in the framework of the h Molecular Field Theory.