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The magnetic properties in Dy-Y, Dy-Nd, Dy-Pr and Gd-Dy-Nd alloy systems have been studied. (GdDy)100-xNdx (x=0, 10, 20 and 30) enter into their sole ferromagnetic ordering phases at temperatures from 165 to 235 K, therefore, this kind bf alloy can be used as new magnetic refrigerants