...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bulletin of the American Physical Society >APS -2017 Annual Fall Meeting of the APS Ohio-Region Section - Event - Effect of Cu doping on the superconducting properties of ZrNi$_{mathrm{2-x}}$Cu$_{mathrm{x}}$Ga.
【24h】

APS -2017 Annual Fall Meeting of the APS Ohio-Region Section - Event - Effect of Cu doping on the superconducting properties of ZrNi$_{mathrm{2-x}}$Cu$_{mathrm{x}}$Ga.

机译：APS -2017年APS俄亥俄州地区分部年度秋季会议-事件-铜掺杂对ZrNi $ _ {mathrm {2-x}} $ Cu $ _ {mathrm {x}} $ Ga超导性能的影响。

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

ZrNi$_{mathrm{2}}$Ga is one of the 19 Heusler compounds that exhibit a weakly coupled BCS type-II superconductivity. For all these materials, the van Hove singularities are believed to play an important role in driving the superconductivity. Partial replacement of Zr by Nb resulted in the broadening of the Van Hove singularity and introduced a high degree of disorder in Zr$_{mathrm{1-x}}$Nb$_{mathrm{x}}$Ni$_{mathrm{2}}$Ga, causing a decrease in the T$_{mathrm{C}}$ of the system. So, it is interesting to explore the superconducting properties of ZrNi$_{mathrm{2-x}}$Cu$_{mathrm{x}}$Ga. Since Cu has one more electron than Ni, the study will allow an understanding of the effect in superconducting properties due to an increase in the valence electron concentrations of the compound. Therefore, we have performed an experimental study on a series of ZrNi$_{mathrm{2-x}}$Cu$_{mathrm{x}}$Ga compounds by x-ray diffraction, electrical resistivity, dc magnetization and ac susceptibility measurements. In agreement with the parent compound, ZrNi$_{mathrm{2}}$Ga, all samples crystallized in the cubic L2$_{mathrm{1hinspace }}$Heusler structure. For x $le $ 0.25, all the ZrNi$_{mathrm{2-x}}$Cu$_{mathrm{x}}$Ga compounds showed superconducting properties with a decrease in T$_{mathrm{c}}$.
机译：ZrNi $ _ {mathrm {2}} $ Ga是19种显示弱耦合BCS II型超导性的Heusler化合物之一。对于所有这些材料，van Hove奇异性被认为在驱动超导性中起着重要作用。用Nb部分替代Zr导致Van Hove奇异性扩大，并在Zr $ _ {mathrm {1-x}} $ Nb $ _ {mathrm {x}} $ Ni $ _ {{mathrm} {2}} $ Ga，导致系统的T $ _ {mathrm {C}} $$减少。因此，探索ZrNi $ _ {mathrm {2-x}} $ Cu $ _ {mathrm {x}} $ Ga的超导特性很有趣。由于铜比镍多一个电子，因此该研究将使人们理解由于该化合物的价电子浓度增加而对超导性能的影响。因此，我们通过X射线衍射，电阻率，直流磁化强度和交流磁化率对一系列ZrNi $ _ {mathrm {2-x}} $ Cu $ _ {mathrm {x}} $ Ga化合物进行了实验研究测量。与母体化合物ZrNi $ _ {mathrm {2}} $ Ga一致，所有样品均在立方L2 $ _ {mathrm {1hinspace}} $ Heusler结构中结晶。对于x $ le $ 0.25，所有ZrNi $ _ {mathrm {2-x}} $ Cu $ _ {mathrm {x}} $ Ga化合物均显示超导性质，T $ _ {mathrm {c}} $降低。

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