Magnetocaloric effect in antiferromagnetic Dy(3)Co compound RID G-6874-2011

Author:

Shen, Jun  Zhao, Jin-Liang  Hu, Feng-Xia  Rao, Guang-Hui  Liu, Guang-Yao  Wu, Jian-Feng  Li, Yang-Xian  Sun, Ji-Rong  Shen, Bao-Gen  

Journal:

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING

Issue Date:

2010

Abstract(summary):

Magnetic properties and magnetocaloric effects (MCEs) of the Dy(3)Co compound are studied. Two successive magnetic transitions: the antiferromagnetic (AFM)-to-AFM transition at T (AF) =29 K and the AFM-to-paramagnetic (PM) transition with increasing temperature at the N,el temperature T (N) =44 K are observed. Dy(3)Co undergoes a field-induced metamagnetic transition from the AFM to the ferromagnetic (FM) state below T (N) , giving rise to a large MCE. The maximal value of magnetic entropy change Delta S (m) is -13.9 J/kg K with a refrigerant capacity (RC) of 498 J/kg around T (N) for a field change of 0-5 T. A sign change of MCE in Dy(3)Co with magnetic field and temperature is observed near the critical field where the metamagnetic transition occurs.

Page:

853---858