J. Mater. Sci. Technol. ›› 2019, Vol. 35 ›› Issue (10): 2283-2287.DOI: 10.1016/j.jmst.2019.05.056

• Orginal Article • Previous Articles     Next Articles

Magnetic properties and magnetocaloric effects of Gd65(Cu,Co,Mn)35 amorphous ribbons

Peng Jiaab*(), Leipeng Duanab, Kang Wangab, Engang Wangab   

  1. a Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang, 110819, China
    b School of Metallurgy, Northeastern University, Shenyang, 110819, China
  • Received:2019-04-29 Revised:2019-05-27 Accepted:2019-05-31 Online:2019-10-05 Published:2019-08-28
  • Contact: Jia Peng

Abstract:

The magnetic phase transition and magnetocaloric effects of Gd65(Cu,Co,Mn)35 amorphous ribbons were investigated. The increased Mn substitution for Co or Mn substitution for Cu led into a higher second-order magnetic phase transformation temperature, near 200 K in all ribbons. Under the field change of 7 T, a maximum entropy change (ΔSmmax) of 6 J kg-1 K-1 was achieved in Gd65Cu10Co20Mn5 ribbon and slightly dependent on the compositions. With varied composition, a full width at half of ΔSmmax was greatly widened to be over than 180 K for Gd65Cu15Co10Mn10 ribbon. The refrigeration capacity was also greatly enhanced to 1000 J kg-1 for Gd65Cu20Co10Mn5 ribbon, which was even excellent compared with other Gd-based amorphous systems.

Key words: Phase transition, Magnetocaloric effect, Refrigeration capacity, Amorphous ribbon, Gd-based ribbon