Development of new all–metal FeCoZrAl amorphous alloys for room–temperature magnetic refrigeration application

Abstract

This study introduces the development of a novel, all–metal Fe₈₈Co₄Zr₇Al₁ amorphous alloy designed for room–temperature magnetic refrigeration application, highlighting the potential of all–metal Fe–based amorphous alloys in magnetic refrigeration applications. By innovatively adjusting the Curie temperature and enhancing the saturation magnetic flux density through Co addition, this work pioneers a strategy to develop all–metal Fe–based amorphous alloys with room–temperature magnetocaloric effect, historically focused on Fe–metalloid configurations with limited breakthroughs. The all–metal Fe₈₈Co₄Zr₇Al₁ amorphous alloy, synthesized via a melt–spinning technique, demonstrates exceptional magnetocaloric effect properties, including a Curie temperature of 303 K, a maximum isothermal magnetic entropy change of 3.23 J kg⁻¹·K⁻¹, and the refrigerant capacity of 650 J kg⁻¹ under an applied magnetic field change of 5 T. These properties, combined with negligible hysteresis loss and lower costs due to the absence of rare earth elements, position the alloy as a promising candidate for room–temperature magnetic refrigerants.