Magnetocaloric effect of Gd64Co26Al9Y1 metallic glass

The samples of Gd64Co26Al9Y1 metallic glass were prepared by splat technique from the high purity elements. The glassy state of the samples was confirmed by the X-ray analysis. Their ferromagnetic ordering with the Curie temperature T-c = 108 K was identified from temperature dependence of magnetization and confirmed by AC-susceptibility measurement. Electrical conductivity of the glass increases with increasing temperature and exhibits a pronounced peak at T-c. The magnetocaloric effect was studied by heat capacity and magnetization isotherms measurements. Magnetic entropy change Delta S = -9.3 J kg(-1) K-1 was derived for a field span of 5 T. The adiabatic temperature change was measured directly in a field span of 4.7 T. (C) 2012 Elsevier B.V. All rights reserved.