Excellent Magnetocaloric Effect in Er60Al18Co22 Bulk Metallic Glass  

作　　者：惠希东 许志一 王恩睿 陈国良 吕昭平 

机构地区：[1]State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083

出　　处：《Chinese Physics Letters》2010年第11期173-176,共4页中国物理快报（英文版）

基　　金：Supported by the National Nature Science Foundation of China （50871013）, and the National Basic Research Program of China （2007CB613901）.

摘　　要：Excellent magnetocaloric effect with a maximum entropy change and refrigeration capacity of 17.6 J·kg^-1·K^-1 and 546 J·kg^-1, respectively, has been discovered in the Er60Al18Co22 bulk metallic glass under the field of 50 kOe in the temperature range of helium liquefaction. This MCE results from the second-order magnetic transition from the paramagnetic to the ferromagnetic state. Our analysis based on mean-field theory suggests that the excellent MCE is attributed to the strong exchange of magnetic moment in the glassy structure.Excellent magnetocaloric effect with a maximum entropy change and refrigeration capacity of 17.6 J·kg^-1·K^-1 and 546 J·kg^-1, respectively, has been discovered in the Er60Al18Co22 bulk metallic glass under the field of 50 kOe in the temperature range of helium liquefaction. This MCE results from the second-order magnetic transition from the paramagnetic to the ferromagnetic state. Our analysis based on mean-field theory suggests that the excellent MCE is attributed to the strong exchange of magnetic moment in the glassy structure.

关 键 词：Condensed matter: electrical magnetic and optical Condensed matter: structural mechanical & thermal 

分 类 号：TP18[自动化与计算机技术—控制理论与控制工程] TG139.8[自动化与计算机技术—控制科学与工程]