Magnetocaloric Effect in Uncoated Gd55Al20Co25 Amorphous Wires

Materials Research

Dawei Xing¹  Hongxian Shen¹  Jingshun Liu¹  Huan Wang¹  Fuyang Cao¹  Faxing Qin¹  Dongming Chen¹  Yanfen Liu¹  Jianfei Sun¹ 

关键词: melt-extraction;    amorphous microwires;    magnetic entropy change;    refrigerating efficiency;   

DOI  :  10.1590/1516-1439.325414

来源: SciELO

【 摘 要 】

The Gd55Al20Co25 amorphous wires exhibit a relatively strong magnetocaloric effect (MCE). These melt-extracted amorphous wires display second-order magnetic transition (SOMT) and the value of maximal magnetic entropy (–ΔSm) for the melt-extracted wires is calculated to be ~9.7 J·kg–1·K–1 around the Curie point (TC) of ~110 K with applied field of 5 T. Moreover, the melt-extracted amorphous wires show a high refrigerating efficiency with a relatively large cooling power (RCP, ~804 J·kg–1) and refrigeration capacity (RC, ~580 J·kg–1) under an applied magnetic field of 5T due to the broad paramagnetic-ferromagnetic (PM-FM) region associated with amorphous alloys. These favorable properties make melt-extracted Gd-based amorphous wires to be the potential refrigerant for magnetic refrigeration (MR) of liquid oxygen.

【 授权许可】

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