Mn_(1.3)Fe_(0.7)P_xSi_(1-x)化合物的磁热效应(英文)  

Magnetocaloric Effect in Mn_(1.3)Fe_(0.7)P_xSi_(1-x) Compounds

作　　者：毕力格[1] 特古斯[1] 伊日勒图[1] 王冬梅[1] 王耀辉[1] 赵志鹏[1] 

机构地区：[1]内蒙古师范大学物理与电子信息学院内蒙古自治区功能材料物理与化学重点实验室,内蒙古呼和浩特010022

出　　处：《内蒙古师范大学学报（自然科学汉文版）》2011年第3期270-273,共4页Journal of Inner Mongolia Normal University(Natural Science Edition)

基　　金：Project Supported by the National Natural Science Foundation of China(50961010);the Inner Mongolia Natural Science Foundation(20080404ZD01);the Inner Mongolia Normal University Innovation Foundation(CXJJS09040)

摘　　要：用球磨和烧结法制备了Mn1.3Fe0.7PxSi1-x系列化合物.磁性测量结果表明,随着P含量的增加,居里温度由x=0.45时的320 K降到x=0.55时的209 K;外加磁场变化为1.5 T时,在居里温度209 K附近,Mn1.3Fe0.7P0.55Si0.45的最大磁熵变为11.3J/(kg·K).该化合物的热滞为10.4 K.良好的磁热效应性能和低廉的原料价格使得该系列化合物有望成为室温区磁制冷工质.The Mn1.3Fe0.7PxSi1-x compounds with x=0.45,0.46,0.50,0.55 were synthesized by ball milling and solid-state sintering method.Magnetization measurements show that the Curie temperature of Mn1.3Fe0.7PxSi1-x compounds decreases from 320 K for x=0.45 to 209 K for x=0.55.A metamagnetic phase transition is observed above the Curie temperature for the compounds with x up to 0.55.The Mn1.3Fe0.7P0.55Si0.45compound exhibits a large magnetocaloric effect of 11.3 J/（kg·K） for a field change from 0 to 1.5 T near its Curie temperature of 209 K.Thermal hysteresis of this compound is 10 K.The excellent magnetocaloric properties and the low material cost of these compounds are very promising for magnetocaloric applications.

关 键 词：过渡族金属 磁热效应 居里温度 磁熵变 一级相变 

分 类 号：O482.54[一般工业技术—材料科学与工程]