Mn_5 Ge_(3-x)Sb_x(x=0,0.1,0.2,0.3)化合物的磁熵变  

MAGNETIC ENTROPY CHANGES OF Mn_5Ge_(3-x)Sb_x(x=0,0.1,0.2,0.3)

作　　者：哈斯巴根[1] 松林[1] 李新文[1] 蒙珍 苏丽萍 李德华 

机构地区：[1]内蒙古师范大学物理系,内蒙古呼和浩特010022 [2]内蒙古大学职业技术学院,内蒙古呼和浩特010023

出　　处：《内蒙古师范大学学报（自然科学汉文版）》2003年第4期340-343,共4页Journal of Inner Mongolia Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50261003);内蒙古自然科学基金资助项目(200208020111)

摘　　要：根据不同温度下Mn5Ge3-xSbx(x=0,0.1,0.2,0.3)的实验磁化曲线,采用二步最小二乘法拟合出磁化强度值,用热力学关系计算了Mn5Ge3-xSbx的磁熵变,并与实验值进行了比较.结果表明,磁熵变的拟合值与实验值基本相符.The magnetic entropy changes of Mn_5Ge_3-xSb_x(x=0,0.1,0.2,0.3) can be calculated by means of magnetization measurements at different temperatures.According to the thermodynamic relation,the magnetic entropy changes can be calculated from the function M(H,T) that was obtained by using two-step least square fitting.It is satisfied by contrast with the experimental results.

关 键 词：锰化合物 磁熵 磁化曲线 最小二乘法 强磁性材料 磁制冷技术 

分 类 号：O482.54[一般工业技术—材料科学与工程] O482.6[理学—固体物理]