...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review >NMR investigation of spin correlations in BaCo_2As_2
【24h】

NMR investigation of spin correlations in BaCo_2As_2

机译：BaCo_2As_2中自旋相关性的NMR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

We use NMR techniques to investigate the magnetic properties of BaCo_2As_2 single crystals, the nonsuper-conducting end member of the Co-substituted iron-pnictide high-T_c superconductor Ba(Fe_(1-x)Co_x)_2As_2 with x = 1. We present ~(75)As NMR evidence for enhancement of low frequency spin fluctuations below ～100 K. This enhancement is accompanied by that of static uniform spin susceptibility at the wave vector q = 0, suggesting that the primary channel of the spin correlations is ferromagnetic rather than antiferromagnetic. Comparison between the NMR Knight shift ~(75)K and bulk susceptibility χ_(bulk) data uncovers the presence of two separate components of spin susceptibility with distinct temperature dependencies, presumably because multiple electronic bands crossing the Fermi energy play different roles in the electronic properties of BaCo_2As_2.
机译：我们使用核磁共振技术来研究BaCo_2As_2单晶的磁性，这是x = 1的Co-取代铁-肽高T_c超导体Ba（Fe_（1-x）Co_x）_2As_2的非超导端成员。 〜（75）作为NMR证据表明〜100 K以下的低频自旋波动有所增强。这种增强伴随着在波矢量q = 0时的静态均匀自旋磁化率，表明自旋相关性的主要通道是铁磁的比反铁磁。 NMR Knight位移〜（75）K和体磁化率χ_（bulk）数据之间的比较揭示了自旋磁化率的两个独立成分的存在，它们具有不同的温度依赖性，这大概是因为跨越费米能量的多个电子带在电子性质中起着不同的作用的BaCo_2As_2。

著录项

  • 来源
    《Physical review》 |2014年第1期|014520.1-014520.6|共6页
  • 作者

    K. Ahilan; T. Imai; A. S. Sefat; F. L. Ning;

  • 作者单位

    Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada L8S4M1;

    Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada L8S4M1 and Canadian Institute for Advanced Research, Toronto, Ontario, Canada M5G1Z8;

    Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA;

    Department of Physics, Zhejiang University, Hangzhou 310027, People's Republic of China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    superconducting materials;

    机译：超导材料;

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