MnFeP0.63Ge0.12Si0.25Bx(x=0,0.01,0.02,0.03)化合物的磁热效应
来源期刊：金属学报2011年第3期
论文作者：王冬梅 松林 王耀辉 张伟 毕力格 特古斯
文章页码：344 - 348
关键词：磁热效应； 热滞； Curie温度； 相变
Key words：magnetocaloric effect； thermal hysteresis； Curie temperature； phase transition
摘 要：对MnFeP0.63Ge0.12Si0.25Bx(x=0,0.01,0.02,0.03,原子分数)化合物的结构和磁热效应(MCE)进行了研究.XRD分析结果表明:MnFeP0.63Ge0.12Si0.25Bx(x=0,0.01,0.02,0.03)的主相均为Fe2P型六角结构,空间群为P62m.随着B含量的增加晶格常数a增大c减小,晶胞体积基本保持不变.磁性测量表明:随着B含量由0增加到0.03时,Curie温度(TC)从300 K升到347 K,热滞分别为20,17,11和6 K.0-1.5 T外磁场下最大磁熵变△SM分别为14.83,11.41,11.26和11.8 J/(kg·K).
Abstract: Structural and magnetocaloric properties of the MnFeP0.63Ge0.12Si0.25Bx (x=0, 0.01,0.02,0.03,atomic fraction) compounds have been investigated.XRD result shows that the MnFeP0.63Ge0.12Si0.25Bx (x=0,0.01,0.02,0.03) compounds mainly consist of the Fe2P-type hexagonal structure phase with space group P62m.It is found that the lattice parameter a increases and the lattice parameter c slightly decreases with increasing x,and the unit cell volume does not change.The magnetic measurements show that the Curie temperature increases from 300 K to 347 K,and thermal hysteresis are 20,17,11 and 6 K for x= 0 to 0.03.The maximum values of the magnetic entropy change are 11.41,11.26 and 11.8 J/(kg·K),respectively,for 0-1.5 T fields.
王冬梅1，松林1，王耀辉1，张伟1，毕力格1，特古斯1
(1.内蒙古自治区呼和浩特市内蒙古师范大学内蒙古自治区功能材料物理与化学重点实验室)
摘 要：对MnFeP0.63Ge0.12Si0.25Bx(x=0,0.01,0.02,0.03,原子分数)化合物的结构和磁热效应(MCE)进行了研究.XRD分析结果表明:MnFeP0.63Ge0.12Si0.25Bx(x=0,0.01,0.02,0.03)的主相均为Fe2P型六角结构,空间群为P62m.随着B含量的增加晶格常数a增大c减小,晶胞体积基本保持不变.磁性测量表明:随着B含量由0增加到0.03时,Curie温度(TC)从300 K升到347 K,热滞分别为20,17,11和6 K.0-1.5 T外磁场下最大磁熵变△SM分别为14.83,11.41,11.26和11.8 J/(kg·K).
关键词：磁热效应； 热滞； Curie温度； 相变
