Electrical and Computer Engineering, Materials Science and Engineering, Ames Laboratory
Journal or Book Title
Journal of Applied Physics
In order to obtain “table-like” magnetocaloric effect (MCE), multiple-phase Gd56Ni15Al27Zr2 alloy was prepared by arc-melting followed by suck-casting method. Powder x-ray diffraction and calorimetric measurements reveal that the sample contains both glassy and crystalline phases. The fraction of the glassy phase is about 62%, estimated from the heat enthalpy of the crystallization. The crystalline phases, Gd2Al and GdNiAl further broadened the relatively wider magnetic entropy change (−ΔSM) peak of the amorphous phase, which resulted in the table-like MCE over a maximum temperature range of 52.5 K to 77.5 K. The plateau feature of the MCE was found to be nearly independent of the applied magnetic field from 3 T to 5 T. The maximum −ΔSMvalue of the MCE platforms is 6.0 J/kg K under applied magnetic field change of 5 T. Below 3 T, the field independence of the table-like feature disappears. The relatively large constant values of −ΔSM for the respective applied magnetic fields have promising applications in magnetic refrigeration using regenerative Ericsson cycle.
AIP Publishing LLC
Balfour, E. Agurgo; Ma, Z.; Hu, F.; Hadimani, Ravi L.; Jiles, David C.; Wang, L.; Luo, Y.; and Wang, S. F., "Table-like magnetocaloric effect in Gd56Ni15Al27Zr2 alloy and its field independence feature" (2015). Ames Laboratory Publications. 407.