Excellent Glass Forming Ability and Refrigeration Capacity of a Gd55Al20Ni12Co10Mna Bulk Metallic Glass

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2013,（9）
• 页码范围: 105-108
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/30/9/096104

摘要

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 3mm.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 5.6mm.The peak value of magnetic entropy change of about 8J·kg-1 K-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.