Magnetocaloric Effect in Uncoated Gd55Al20Co25 Amorphous Wires

AUTOR(ES)

Xing, Dawei, Shen, Hongxian, Liu, Jingshun, Wang, Huan, Cao, Fuyang, Qin, Faxing, Chen, Dongming, Liu, Yanfen, Sun, Jianfei

FONTE

Mat. Res.

DATA DE PUBLICAÇÃO

04/12/2015

RESUMO

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.

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