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Large magnetic entropy change and adiabatic temperature rise of a Gd55Al20Co20Ni5 bulk metallic glass (2014)

L. Xia, M. B. Tang, K. C. Chan and Y. D. Dong

American Institute of Physics (AIP)

In: Journal of Applied Physics

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Publikationsdatum: 2014-06-11

Beschreibung: Gd 55 Al 20 Co 20 Ni 5 bulk metallic glass (BMG) was synthesized by minor Ni substitution for Co in the Gd 55 Al 20 Co 25 BMG in which excellent glass forming ability (GFA) and magneto-caloric effect were reported previously. The Gd 55 Al 20 Ni 20 Co 5 amorphous rod has a similar GFA to the Gd 55 Al 20 Co 25 BMG but exhibits better magnetic properties. The peak value of magnetic entropy change (− ΔS m peak ) of the Gd 55 Al 20 Co 20 Ni 5 BMG is 9.8 Jkg −1 K −1 . The field dependence of − ΔS m peak follows a − Δ S m p e a k ∝ H 0.85 relationship. The adiabatic temperature rise of the rod is 4.74 K under 5 T and is larger than of other BMGs previously reported. The improved magnetic properties were supposed to be induced by the enhanced interaction between 4f electron in the rare-earth and 3d electron in the transition metal elements by means of a minor Ni substitution for Co.

Print ISSN: 0021-8979

Digitale ISSN: 1089-7550

Thema: Physik

Publiziert von American Institute of Physics (AIP)

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