...
首页> 外文期刊>Physical review >Magnetic order induced by Fe substitution of Al site in the heavy-fermion systems α-YbAlB_4 and β-YbAIB_4
【24h】

Magnetic order induced by Fe substitution of Al site in the heavy-fermion systems α-YbAlB_4 and β-YbAIB_4

机译:Fe-重铁蛋白体系中Al位置的Fe取代引起的磁序-α-YbAlB_4和β-YbAIB_4

获取原文
获取原文并翻译 | 示例
           

摘要

β- YbAlB_4 is a heavy-fermion superconductor that exhibits a quantum criticality without tuning at zero field and under ambient pressure. We have succeeded in substituting Fe for Al in β-YbAlB_4 as well as the polymorphous compound α-YbAlIB_4, which in contrast has a heavy Fermi-liquid ground state. Full structure determination by single-crystal x-ray diffraction confirmed no change in crystal structure for both α- and β-YbAlB_4, in addition to volume contraction with Fe substitution. Our measurements of the magnetization and specific heat indicate that both α-YbAl_(0.93)Fe_(0.07)B_4 and β-YbAl_(0.94)Fe_(0.06)B_4 exhibit a magnetic order, most likely of a canted antiferromagnetic type, at 7 ~ 9 K. The increase in the entropy as well as the decrease in the antiferromagnetic Weiss temperature with the Fe substitution in both systems indicates that the chemical pressure due to the Fe substitution suppresses the Kondo temperature and induces the magnetism.
机译:β-YbAlB_4是一种重金属费米子超导体,在零场和环境压力下不发生调谐就显示出量子临界。我们已经成功地用铁代替了β-YbAlB_4中的Al以及多晶型化合物α-YbAlIB_4,而后者具有大量费米液体基态。通过单晶X射线衍射确定的全结构确定了α-和β-YbAlB_4的晶体结构,除了有铁取代的体积收缩之外,没有任何变化。我们对磁化强度和比热的测量表明,α-YbAl_(0.93)Fe_(0.07)B_4和β-YbAl_(0.94)Fe_(0.06)B_4都在7〜7时表现出磁阶,很可能是倾斜反铁磁型。在两个系统中,Fe的熵增加和反铁磁Weiss温度的降低都表明9 Fe。由于Fe取代引起的化学压力抑制了Kondo温度并引起了磁性。

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