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Table-like magnetocaloric effect in Gd56Ni15Al27Zr2 alloy and its field independence feature

TitleTable-like magnetocaloric effect in Gd56Ni15Al27Zr2 alloy and its field independence feature
Publication TypeJournal Article
Year of Publication2015
AuthorsBalfour, EA, Ma, Z, Fu, H, Hadimani, RL, Jiles, DC, Wang, L, Luo, Y, Wang, SF
JournalJournal of Applied Physics
Date Published09
Type of ArticleArticle
ISBN Number0021-8979
Accession NumberWOS:000362565800015
Keywordscomposite-materials, crystalline, cycle, magnetic-properties, refrigeration, room-temperature

magnetocaloric effect (MCE), multiple-phase Gd56Ni15Al27Zr2 alloy was prepared by arc-melting followed by suck-casting method. Powder x-ray diffraction and calorimetric measurements reveal that the sample contains both glassy and crystalline phases. The fraction of the glassy phase is about 62%, estimated from the heat enthalpy of the crystallization. The crystalline phases, Gd2Al and GdNiAl further broadened the relatively wider magnetic entropy change (-Delta S-M) peak of the amorphous phase, which resulted in the table-like MCE over a maximum temperature range of 52.5 K to 77.5 K. The plateau feature of the MCE was found to be nearly independent of the applied magnetic field from 3 T to 5 T. The maximum -Delta S-M value of the MCE platforms is 6.0 J/kg K under applied magnetic field change of 5 T. Below 3 T, the field independence of the table-like feature disappears. The relatively large constant values of -Delta S-M for the respective applied magnetic fields have promising applications in magnetic refrigeration using regenerative Ericsson cycle. (C) 2015 AIP Publishing LLC.

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