Phase transition and magnetocaloric effect of Ni_(55.2)Mn_(18.6)Ga_(26.2-x)Gd_x (x=0,0.05,0.15) alloys  

作　　者：鲍博 龙毅 段静芳 吴光恒 叶荣昌 万发荣 

机构地区：[1]School of Materials Science and Engineering,University of Science and Technology Beijing [2]Institute of Physics,Chinese Academy of Sciences

出　　处：《Journal of Rare Earths》2009年第5期875-878,共4页稀土学报（英文版）

基　　金：Project supported by the National Science Foundation of China;the National Basic Research Program of China and Institute of Physics,Chinese Academy of Sciences

摘　　要：Phase transition process and magnetic entropy change -Delta S of Ni55.2Mn18.6Ga26.2-xGdx(x=0, 0.05, 0.15) alloys were studied. Ni55.2Mn18.6Ga26.2-xGdx(x=0, 0.05, 0.15) alloys still underwent simultaneous structural and magnetic transitions and transform from ferro-magnetic martensitic phase to paramagnetic austenitic phase during heating. Under a field of 2 T, the maximum magnetic entropy change -Delta S-M of Ni55.2Mn18.6Ga26.15Gd0.05 alloy was 7.7 J/kg.K at 317 K during heating and 8.6 J/kg.K at 314 K during cooling while it was 11.8 J/kg.K at 317 K in Ni55.2Mn18.6Ga26.05Gd0.15 alloy during heating.Phase transition process and magnetic entropy change -Delta S of Ni55.2Mn18.6Ga26.2-xGdx(x=0, 0.05, 0.15) alloys were studied. Ni55.2Mn18.6Ga26.2-xGdx(x=0, 0.05, 0.15) alloys still underwent simultaneous structural and magnetic transitions and transform from ferro-magnetic martensitic phase to paramagnetic austenitic phase during heating. Under a field of 2 T, the maximum magnetic entropy change -Delta S-M of Ni55.2Mn18.6Ga26.15Gd0.05 alloy was 7.7 J/kg.K at 317 K during heating and 8.6 J/kg.K at 314 K during cooling while it was 11.8 J/kg.K at 317 K in Ni55.2Mn18.6Ga26.05Gd0.15 alloy during heating.

关 键 词：NIMNGA magnetocaloric effect (MCE) magnetic transition structural transition magnetic entropy change rare earths 

分 类 号：TG146.15[一般工业技术—材料科学与工程]