摘要
LaFe11.6Si1.4Bx(x=0.1,0.2,0.3和0.4)系列化合物,通过添加少量的B后,可以明显的缩短退火时间,并且晶格常数随着B含量的增加而逐渐增大,居里温度随着B的增加分别从182K升高到185K,在外加磁场变化为0-1.5T时,等温磁熵变的最大值达到36.1J/kgK(x=0.2)。该系列化合物在B含量较低时,处于居里温度之上则存在比较明显的场致变磁转变特性。
The annealing time of LaFe11.6Si1.4Bx(x=0.1,0.2,0.3and 0.4) compounds can be reduced obviously by introducing interstitial atom B.The lattice parameter slightly increases with increasing B content.By changing the boron concentration from 0 to 0.4,the Curie temperature(Tc)increases from 182 to 185 K.The maximal magnetic entropy change reaches 36.1 J/kgK for a magnetic field change from 0 to 1.5 T.There is an obvious itinerant electron metamagnetic(IEM) transition for low B content above the Curie temperature.
出处
《黄山学院学报》
2011年第3期9-12,共4页
Journal of Huangshan University
基金
安徽省高校青年人才基金资助(2011SQRL140)
关键词
磁熵变
磁热效应
变磁转变
magnetic entropy change
magnetocaloric effect
itinerant electron metamagnetic transition