63Cu NMR evidence for enhanced antiferromagnetic correlations around Zn impurities in YBa2Cu3O6.7
63Cu NMR evidence for enhanced antiferromagnetic correlations around Zn impurities in YBa2Cu3O6.7
复制标题
DOI：
10.1103/physrevlett.84.3422
复制
发表时间：
2000-04-10
影响因子：
8.6
通讯作者：
Marucco, JF
中科院分区：
文献类型：
--
作者：
Julien, MH;Fehér, T;Marucco, JF
研究表明，在高T-c超导体YBa2Cu3O6.7的CuO 2平面中掺入1.5%的非磁性Zn杂质，会使Cu-63核磁共振谱显着增宽，并且在Cu-63自旋中检测到的低能磁涨落增加-晶格弛豫测量。一个模型独立的分析表明，这些影响是由于发展交错的磁矩在许多Cu网站周围的每个锌和锌诱导的时刻，在体磁化率可能会解释这种交错的磁化。这些增强的反铁磁相关的几个影响进行了讨论。
Doping the high-T-c superconductor YBa2Cu3O6.7 with 1.5% of nonmagnetic Zn impurities in CuO2 planes is shown to produce a considerable broadening of Cu-63 NMR spectra, as well as an increase of low-energy magnetic fluctuations detected in Cu-63 spin-lattice relaxation measurements. A model-independent analysis demonstrates that these effects are due to the development of staggered magnetic moments on many Cu sites around each Zn and that the Zn-induced moment in the bulk susceptibility might be explained by this staggered magnetization. Several implications of these enhanced antiferromagnetic correlations are discussed.