Study on Gd-Al-Dy System Magnetic Refrigeration Materials

Gd-Al-Dy system materials were prepared by the technique of powder sintering. Two-layers gradient function materials with compositions of (Gd0.9 Dy0.1)3 Al2 andGd2 respectively were studied. The results show that the Curie temperature (Tc) of the monolayer material decreases with the increment of Dy content. The Tc values of the two-layer gradient function material agree well with the layer numbers and corresponding to Dy content. For the Tc gradiently changed two-layers Gd-Al-Dy system material, its ΔSm changes smoothly with temperature. Therefore, the magnetic refrigeration is improved.