Magnetocaloric effect in Gd₆Co_1.67Si₃ compound with a second-order phase transition

【摘要】 The magnetic properties and the magnetic entropy change S have been investigated for Gd6Co1.67Si3 compounds with a second-order phase transition. The saturation moment at 5 K and the Curie temperature T C are 38.1 μ B and 298 K, respectively. The S originates from a reversible second-order magnetic transition around T C and its value reaches 5.2 J/kg · K for a magnetic field change from 0 to 5 T. The refrigerant capacity (RC) of Gd6Co1.67Si3 are calculated by using the methods given in Refs.[12] and [21], respectively, for a field change of 0-5 T and its values are 310 and 440 J/kg, which is larger than those of some magnetocaloric materials with a first-order phase transition.更多还原

【Abstract】 The magnetic properties and the magnetic entropy change S have been investigated for Gd6Co1.67Si3 compounds with a second-order phase transition. The saturation moment at 5 K and the Curie temperature T C are 38.1 μ B and 298 K, respectively. The S originates from a reversible second-order magnetic transition around T C and its value reaches 5.2 J/kg · K for a magnetic field change from 0 to 5 T. The refrigerant capacity (RC) of Gd6Co1.67Si3 are calculated by using the methods given in Refs.[12] and [21], respectively, for a field change of 0–5 T and its values are 310 and 440 J/kg, which is larger than those of some magnetocaloric materials with a first-order phase transition.更多还原