Magnetocaloric effect in Er-Al-Co bulk metallic glasses

• 来源期刊: 科学通报(英文版)
• 学科: 工学
• 年，卷（期）: 2011,（36）
• 页码范围: 3978-3983
• 页数: 6页
• 分类号: TG139.8
• 语种: 中文

摘要

A series of Er-Al-Co bulk metallic glasses (BMGs) have been prepared by the copper mold casting method. The glass forming ability and magnetocaloric effect (MCE) for these alloys have been investigated. The second-order magnetic transition from para-magnetic to ferromagnetic states takes place at about 9 K. These BMGs exhibit excellent MCE because of their large effective magneton number; Er56Al24Co20 BMG has a maximum entropy change and refrigeration capacity of 16.06 J kg-1 K-1 and 546 J kg-1,respectively,under the field of 50 kOe (10 kOe=795.775 kA/m) indicating that these BMGs are potential candidate magnetic materials for hydrogen liquefaction.