NMR study of uranium-based ferromagnetic superconductors

铀基铁磁超导体的核磁共振研究

• 批准号: 21740272
• 负责人: TOKUNAGA Yo
• 金额: $ 2.83万
• 依托单位: Japan Atomic Energy Agency
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21740272/
• 关键词: 強相関系; 核磁気共鳴; 超伝導; 強相関電子系; 強磁性超伝導; 遍歴電子; 遍歴雷子

In order to investigate the relationship between magnetism and superconductivity in f-electron systems, NMR measurements have been performed in several UCoGe samples synthesized with different conditions. We have found that the volume of ferromagnetic phase in the samples increases with increasing their residual resistance ratio (RRR). Since bulk measurements indicate that the volume of superconducting phase also increases with increasing RRR, the NMR result suggests that the ferromagnetic ordering is essential for the occurrence of superconductivity in UCoGe.

为了研究f电子系统中磁性与超导性之间的关系，对几种不同条件下合成的UCoGe样品进行了核磁共振测量。我们发现样品中铁磁相的体积随着残余电阻比的增大而增大。由于体积测量表明，超导相的体积也随着RRR的增加而增加，因此核磁共振结果表明，铁磁有序对UCoGe中超导性的发生至关重要。

项目成果

Anisotropic spin fluctuations in Heavy-fermion superconductor NpPd_5Al_2

重费米子超导体NpPd_5Al_2中的各向异性自旋涨落

• 发表时间: 2010
• 期刊: J.Phys.Soc.Japan 79
• 作者: H.Chudo;H.Sakai;他
• 通讯作者: 他