Magnetocaloric effects in (Gd1−xTbx)Co2

The structures and magnetocaloric effects of (Gd1−xTbx)Co2 (x=0, 0.25, 0.4, 0.5, 0.6, 0.7, 0.8, and 1) pseudobinary compounds were investigated by X-ray powder diffraction and magnetic properties measurement. The results show that the Tc of the alloy is near room temperature when X=0.6. The magnetic entropy changes of the compounds increase from 1.7 to 3.6 J/kg K with increasing the content of Tb under an applied field up to 2 T. All the compounds exhibit second order magnetic change. As a result, the values of their ΔSM are lower than that of some large magnetocaloric effect materials.