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Modification of magnetic and magnetocaloric properties of Dy–Co–Al bulk metallic glass introduced by hydrogen

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3 Author(s)
Fu, H. ; Department of Applied Physics, University of Electronic Science and Technology of China, Chengdu, 610054, People’s Republic of China ; Zou, M. ; Singh, Niraj K.

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Dy53.8Co17.3Al28.9 bulk metallic glass with a diameter of 3 mm exhibits spin-glass behavior and large coercivity and remanence. Hydrogenation of Dy53.8Co17.3Al28.9 suppresses the magnetic transition temperature and removes coercivity and remanence because of the expansion of average interatomic distance. The advantage of large magnetic entropy changes (17.5 and 9.5 J/kg K for the field changes from 0 to 50, and from 0 to 20 kOe, respectively) without any hysteresis loss makes Dy53.8Co17.3Al28.9 H170.6 alloy a promising magnetic refrigerant.

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Applied Physics Letters  (Volume:97 ,  Issue: 26 )