Magnetocaloric effect contributed by in situ dual-phase structure in the Gd-Co-Al alloy

作者：Fu, H.^*; Zheng, Q.; Wang, M. X.

来源：Applied Physics Letters, 2011, 99(16): 162504.

DOI：10.1063/1.3652913

• aluminium alloys
• cobalt alloys
• gadolinium alloys
• magnetic cooling
• magnetic structure

In many cases, the presence of secondary phase will deteriorate the magnetocaloric effect of materials due to the difference in magnetic properties. However, the alloy with in situ dual-phase structure and good magnetocaloric effect was found in the pseudo-binary GdCo(2)-GdAl(2) system. Experiments revealed that the GdCo(0.65)Al(1.35) alloy comprised the primary terminal GdAl(2) phase and the secondary intermediate GdCo(0.74)Al(1.26) phase. Both of them ordered at 70 K simultaneously. Large magnetic entropy change and relative cooling power of 11.0 J/kg K and 638 J/kg for 0-50 kOe field changes, respectively, were obtained due to the contribution of both GdAl(2) and GdCo(0.74)Al(1.26) phases.

• 出版日期2011-10-17
• 单位电子科技大学