Achieving a table-like magnetic entropy change across the ice point of water with tailorable temperature range in Gd-Co-based amorphous hybrids

Abstract

Alloys exhibiting table-like magnetic entropy change (−ΔSm) profiles are regarded as ideal magnetic refrigerants for the Ericsson magnetic refrigeration cycle. In this work, we fabricated two Gd-Co-based amorphous hybrids using various combinations of Gd50Co50, Gd50Co48Fe2, Gd50Co48Mn2 and Gd50Co45Mn5 amorphous ribbons with Curie temperatures ranging from 245 K to 278 K, and obtained table-like −ΔSm profiles across the ice point of water within different temperature ranges. The maximum −ΔSm and refrigeration capacity of the amorphous hybrids were higher than those of other amorphous alloys or composites with flattened −ΔSm values near room temperature, indicating that amorphous hybrids are good candidates for magnetic refrigerants in house-hold magnetic refrigerators.