Muon-spin-relaxation and magnetic-susceptibility studies of the effects of the magnetic impurity Ni on the Cu-spin dynamics and superconductivity in La2-xSrxCu1-yNiyO4 with x=0.13 -: art. no. 060504
Muon-spin-relaxation and magnetic-susceptibility studies of the effects of the magnetic impurity Ni on the Cu-spin dynamics and superconductivity in La2-xSrxCu1-yNiyO4 with x=0.13 -: art. no. 060504
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DOI：
10.1103/physrevb.70.060504
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发表时间：
2004-08-01
影响因子：
3.7
通讯作者：
Nagamine, K
中科院分区：
文献类型：
--
作者：
Adachi, T;Yairi, S;Nagamine, K
本文研究了磁性杂质Ni对La2-xSrxCu1-yNiyO4中cu自旋动力学和超导性的影响，其中x=0.13使y变化很小，最高可达0.10。与非磁性杂质Zn的情况相比，从介子自旋弛豫测量中发现，需要大量的Ni来稳定Cu自旋的磁顺序。然而，随着杂质浓度的增加，磁序趋于稳定的演变在性质上是相似的。Cu自旋在Ni周围的非超导缓慢波动或静态区域的面积小于Zn周围的区域，这表明Ni对较长范围的动态自旋相关（即所谓的动态条纹）的钉住比Zn弱。这可能是Zn比Ni更明显地破坏空穴掺杂高t -c铜酸盐的超导性的原因。
Effects of the magnetic impurity Ni on the Cu-spin dynamics and superconductivity have been studied in La2-xSrxCu1-yNiyO4 with x=0.13 changing y finely up to 0.10. Compared with the case of the non-magnetic impurity Zn, it has been found from the muon-spin-relaxation measurements that a large amount of Ni is required to stabilize a magnetic order of Cu spins. However, the evolution toward the stabilization of the magnetic order with increasing impurity concentration is qualitatively similar to each other. The area of the non-superconducting and slowly fluctuating or static region of Cu spins around Ni has been found to be smaller than that around Zn, suggesting that the pinning of rather long-ranged dynamical spin correlation such as the so-called dynamical stripe by Ni is weaker than that by Zn. This may be the reason why Zn destroys the superconductivity in the hole-doped high-T-c cuprates more markedly than Ni.