欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
在充有高纯氮气的石英管中对具有NaZn13型相结构的LaFe11．58Si1．42化合物进行了氮化处理，并对氮化样品的晶体结构和磁热效应做了系统研究。结果表明，对LaFe11．58Si1．42样品进行氮化处理时，压强是一个非常重要的参数。在氮化压强较低的条件下，可以通过提高氮化温度使样品氮化效果明显。间隙原子氮的进入导致样品晶胞体积膨胀，居里温度升高。样品的Arrott曲线表明，磁转变由一级相变逐渐变为二级相变。吸氮使样品的磁熵变减小。
英文摘要：
Nitrogen insertion into the LaFe11.58Sit.42 compound with NaZn13-type crystal structure was carried out in a vacuum quartz tube under a high-purity N2 atmosphere. The crystal structure and the magnetocaloric effect of the nitrides were investigated. It is found that nitrogenation pressure is a very important parameter to obtain LaFeH.58Si1.42 nitrides. In the experimental conditions of lower nitrogen pressure, increasing nitrogenation temperature could cause an obvious nitriding effect. The insertion of interstitial nitrogen atoms leads to lattice expansion and the increase of Tc. The Arrott plots of samples show that the magnetic phase transition of the samples changes from the first order to the second order. The nitrogen insertion reduces the magnetic entropy change of LaFe11.58Si1.42 compound.
同期刊论文项目
同项目期刊论文
期刊信息
位置：