Excellent Glass Forming Ability and Refrigeration Capacity of a Gd55Al20Ni12Co10Mn3 Bulk Metallic Glass
DING Ding1, WANG Peng1, GUAN Quan1, TANG Mei-Bo2, XIA Lei1**
1Laboratory for Microstructure, Shanghai University, Shanghai 200072 2Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050
Abstract：We investigate an excellent refrigeration capacity Rc of Gd55Al20Ni12Co10Mn3 bulk metallic glass (BMG). The Gd55Al20Ni12Co10Mn3 glassy rod is subjected to Cu mold suction-casting to prepare bulky metallic glasses, with a diameter of 3 mm. The glass forming ability as well as the magnetic properties of the BMG is investigated. The BMG exhibits a rather high glass formation ability with critical diameter of about 5.6 mm. The peak value of magnetic entropy change of about 8 J?kg?1K?1 is obtained in this alloy. This BMG alloy also exhibits excellent magnetic refrigerant capacity of about 880 J?kg?1 under the field of 5 T and 35% larger than that of other alloys reported previously, supposed to be closely related to the high effective moment (～7.3μB) of the Gd55Al20Ni12Co10Mn3 BMG.
2013, Vol. 30 
