Correlation between electron spin resonance and magnetization in Gd5Ge4
Correlation between electron spin resonance and magnetization in Gd5Ge4
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Gd5Ge4 中电子自旋共振与磁化强度的相关性
DOI：
10.1103/physrevb.80.054401
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发表时间：
2009-08-01
影响因子：
3.7
通讯作者：
Wang, Y. C.
中科院分区：
文献类型：
--
作者：
Ouyang, Z. W.;Nojiri, H.;Wang, Y. C.
本文报道了非中心对称超导体Mg_（9.3）Ir_（19）B_（16.7）（Tc =5.8 K）和Mg_（10.5）Ir_（19）B_（17.1）（Tc =4.8 K）的B ~（11）NMR测量结果。自旋-晶格弛豫速率和Knight位移表明库珀对主要处于各向同性带隙的自旋单重态。然而，Mg 10.5Ir19B17.1被发现有更多的缺陷和自旋磁化率保持有限，即使在零温度极限。我们认为这是由于缺陷增强了自旋轨道耦合，产生了更多的自旋三重态分量。
We report B-11 NMR measurements in noncentrosymmetric superconductors Mg9.3Ir19B16.7 (T-c=5.8 K) and Mg10.5Ir19B17.1 (T-c=4.8 K). The spin-lattice relaxation rate and the Knight shift indicate that the Cooper pairs are predominantly in the spin-singlet state with an isotropic gap. However, Mg10.5Ir19B17.1 is found to have more defects and the spin susceptibility remains finite even in the zero-temperature limit. We interpret this result as that the defects enhance the spin-orbit coupling and bring about more spin-triplet component.