摘要
研究了Mn_(1.25)Fe_(0.65)P_(0.5-x)S_(0.5+x)(x=0.02,0.04,0.06,0.08)系列化合物的结构和磁性.X射线衍射结果表明,化合物的主相均为Fe2P型六角结构,空间群为P62m.磁性测量表明,化合物均经历了一级相变;随着Si含量的增加,化合物的居里温度逐渐增大,磁熵变逐渐减小,饱和磁化强度略有降低,但热滞无明显变化.
This paper reports the magnetic thermal effect of Mn1.25Fe0.65P0.5-xSi0.5＋x（x = 0.02,0.04, 0.06,0.08） compounds. The results show that the magnetic properties of the series of compounds indicate the first-order phase transition. With the increase of the Si content,the curie temperature tends to increase gradually. With the increase of the content of Si, the thermal hysteresis is kept constant at 5 K. When the content of Si is 0.58,the curie temperature is 305.04K. When the Si content is 0.52,the magnetic entropy change of the compound is the largest,and the maximum magnetic entropy becomes 2.83J/（kg·K） for a field change of 1.5 T. The main phase of the series of compounds is FezP hexagonal structure with space group P62m.
作者
包建华
松林
王莹
鲍迪
BAO Jian-hua Songlin WANG Ying BAO Di(College of Physics and Electronic Information, Inner Mongolia Normal University, Hohhot 010022, China)
出处
《内蒙古师范大学学报（自然科学汉文版）》
CAS
北大核心
2017年第2期192-194,共3页
Journal of Inner Mongolia Normal University(Natural Science Edition)
基金
国家自然科学基金资助项目(11404176)
内蒙古自然科学基金资助项目(2014BS0108)
关键词
MnFe(P
Si)化合物
居里温度
热滞
磁熵变
MnFe （P, Si） compounds
Curie temperature
thermal hysteresis
magnetic entropy change
