Magnetocaloric effect in Gd5Si1.85Ge2.15 prepared by Gd metal with lower purity  

作　　者：LONGYi CHENYanping LILihui WANFarong LIChunhe LIUZhuhong WUGuangzhu 

机构地区：[1]SchoolofMaterialsScienceandEngineering,UniversityofScienceandTechnology,Beijing100083,China [2]ChinaStateKeyLaboratoryforMagnetism,InstituteofPhysics,Chi-neseAcademyofSciences,Beiiing100080,China

出　　处：《Chinese Science Bulletin》2003年第17期1791-1793,共3页

基　　金：supported by the National Natural Science Foundation of China(Grant No.50071006);the“863”Program(Grant No.2002AA324101).

摘　　要：The magnetic phase transition and magneto- caloric effect of Gd5Si1.85Ge2.15 alloy are studied. The alloy was prepared from distilled commercial gadolinium. The major impurities (in wt.%) in the distilled commercial Gd are 0.016 O, 0.0054 C, and 0.0016 N. The impurities are higher than those in the high pure Gd but lower than those in commercial Gd. The results of X-ray diffraction and magnetic susceptibility show that there exists the first-order magnetic phase transition in the Gd5Si1.85Ge2.15 alloy at 253 K. The maximum of magnetic entropy change Smax is 12.5 J/kg·K near the temperature of magnetic phase transition in the alloy.The magnetic phase transition and magneto- caloric effect of Gd5Si1.85Ge2.15 alloy are studied. The alloy was prepared from distilled commercial gadolinium. The major impurities (in wt.%) in the distilled commercial Gd are 0.016 O, 0.0054 C, and 0.0016 N. The impurities are higher than those in the high pure Gd but lower than those in commercial Gd. The results of X-ray diffraction and magnetic susceptibility show that there exists the first-order magnetic phase transition in the Gd5Si1.85Ge2.15 alloy at 253 K. The maximum of magnetic entropy change Smax is 12.5 J/kg·K near the temperature of magnetic phase transition in the alloy.

关 键 词：钆合金 Gd5Si1.85Ge2.15 热磁效应 磁相迁移 磁致冷 

分 类 号：TG146.45[一般工业技术—材料科学与工程] TG113.225[金属学及工艺—金属材料]