Gd_(3-x)Mn_xAl_2系合金磁热效应的直接测量  

Direct Measurement of Magnetocaloric Effects in Gd_(3-X)Mn_xAl_2 Alloys

作　　者：生利英[1] 徐来自[2] 黄焦宏[2] 金培育[2] 刘金荣[2] 邱巨峰[2] 

机构地区：[1]包头职业技术学院,内蒙古包头014030 [2]包头稀土研究院,内蒙古包头014030

出　　处：《稀土》2007年第4期93-94,98,共3页Chinese Rare Earths

摘　　要：用真空高频磁悬浮炉制备了Gd3Al2,Gd2.9Mn0.1Al2,Gd2.8Mn0.2Al2,Gd2.7Mn0.3Al2四种合金。用直接测量法测量了在1.5T磁场下这四种合金的磁热效应。结果表明,在1.5T磁场下,Gd3Al2,Gd2.9Mn0.1Al2,Gd2.8Mn0.2Al2的最大绝对温变分别为2K,1.5K和1.3K;随Mn含量的增加,居里温度Tc提高。Gd3Al2,Gd2.9Mn0.1Al2,Gd2.8Mn0.2Al2,Gd2.7Mn0.3Al2 alloys were prepared in a high frequency levitation furnace. The magnetocatoric effects of these alloys were measured directly at the magnetic field of 1.5 Tesla. The results indicated that the maximum adiabatic temperature changes of Gd3A12,Gd2.9Mn0.1Al2 and Gd2.8Mn0.2Al2 in the magnetic field change of 1.5-0 Tesla are 2K, 1.5K and 1.3K,respectively. The cure temperatures increase with ino creasing content of Mn.

关 键 词：Gd3-xMnxAl 磁热效应 直接测量 绝对温变 

分 类 号：O482.5[理学—固体物理]