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Glass-Forming Ability and Magnetocaloric Effect in {\rm Gd}_{55}{\rm Co}_{20}{\rm Al}_{25-{\rm x}}{\rm Si}_{\rm x} Bulk Metallic Glass

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2 Author(s)
Qian Li ; Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, , Chinese Academy of Sciences, , Ningbo, China ; Baolong Shen

In this letter, we investigated the effect of Si addition on glass forming ability and magnetocaloric effect in Gd-Co-Al bulk glassy alloys. It is found that the addition of only 1 at.% or 2 at.% Si is effective for extension of the supercooled liquid region (ΔTx) and decrease of the fragility parameter m. As a result, Gd-based glassy alloys with diameters up to 5 mm were successfully synthesized. The alloys also exhibit large MCE, i.e., having the magnetic entropy change (-ΔSm) of 9.2 J kg-1 K-1, the full width at half maximum of the -ΔSm (δTFWHM) of 87 K, and the refrigerant capacity (RC) of 800 J kg-1.

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IEEE Transactions on Magnetics  (Volume:47 ,  Issue: 10 )