• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bulletin of the Chemical Society of Japan >Magnetic Studies oon Quaternary Iron Sulfides BaLn_2FeS_5(Ln=Ce,Pr,Nd,Sm)by Magnetic Susceptibility,Specific Heat,~57Fe Mossbauer Spectrum,and Neutron Diffraction Measurements
【24h】

Magnetic Studies oon Quaternary Iron Sulfides BaLn_2FeS_5(Ln=Ce,Pr,Nd,Sm)by Magnetic Susceptibility,Specific Heat,~57Fe Mossbauer Spectrum,and Neutron Diffraction Measurements

机译：磁化率，比热，〜57Fe Mossbauer谱和中子衍射测量对第四季硫化铁BaLn_2FeS_5（Ln = Ce，Pr，Nd，Sm）的磁性研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Magnetic properties of quaternary iron sulfides,BaLn_2FeS_5(Ln=Ce,Pr,Nd,Sm),have been investigated through magnetic susceptibility,electrical resistivity,specific heat,~57Fe Mossbauer spectrum,and powder neutron diffraction measurements.In these compounds,the Fe~2+ ion exhibits an antiferromagnetic ordering at around 40K.In the Nd and Sm compounds,these lanthanide ions show an antiferromagnetic ordering at 6.5 K for Ln=Nd and at 28 K for Ln=Sm.The reduction of the Fe~2+ magnetic moment is observed below 120-170 K for all the compounds.Their electrical conductivities show an Arrhenius temperature-dependence,and the activation energies change at around the moment-reduction temperatures.The ~57Fe Mossbauer spectra for BaPr_2FeS_5 indicate that the FeS_4 tetrahedron is distorted prominently below the temperature at which both the magnetic susceptibility and the electrical resistivity show an anomaly in their temperature dependence.The neutron diffraction data collected for BaPr_2FeS_5 at 10 K show that it has a collinear antiferromagnetic structure and that the magnetic moments of the Fe~2+ ions are parallel to the c-axis.
机译：通过磁化率，电阻率，比热，〜57Fe Mossbauer谱和粉末中子衍射测量研究了季铁硫化物BaLn_2FeS_5（Ln = Ce，Pr，Nd，Sm）的磁性。 〜2 +离子在40K左右具有反铁磁有序性。在Nd和Sm化合物中，这些镧系元素离子在Ln = Nd的6.5 K和Ln = Sm的28 K上具有反铁磁有序性.Fe〜2 +的还原所有化合物在120-170 K以下观察到磁矩。它们的电导率显示出Arrhenius温度依赖性，并且活化能在矩矩降低温度附近变化.BaPr_2FeS_5的〜57Fe Mossbauer光谱表明FeS_4四面体为在磁化率和电阻率都显示出温度依赖性异常的温度以下，温度显着变形。BaPr_2FeS_5的中子衍射数据为1 0 K表明它具有共线反铁磁结构，并且Fe〜2 +离子的磁矩平行于c轴。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号