Muon-spin-relaxation study of the effect of nonmagnetic impurities on the Cu-spin fluctuations in La 2-x Sr x Cu 1-y Zn y O 4 around x=0.115
Muon-spin-relaxation study of the effect of nonmagnetic impurities on the Cu-spin fluctuations in La 2-x Sr x Cu 1-y Zn y O 4 around x=0.115
复制标题
非磁性杂质对x=0.115附近La 2-x Sr x Cu 1-y Zn y O 4 中Cu自旋涨落影响的μ子自旋弛豫研究
DOI：
10.1103/physrevb.65.180516
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发表时间：
2002
影响因子：
3.7
通讯作者：
K. Nagamine
中科院分区：
文献类型：
--
作者：
I. Watanabe;T. Adachi;K. Takahashi;S. Yairi;Y. Koike;K. Nagamine
进行了零场μ子自旋弛豫$(\ensuremath{\mu}\mathrm{SR})$测量，以研究非磁性杂质对Zn取代的Cu自旋波动动力学的影响${\mathrm{La}}_{2\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{Cu}}_{1\ensuremath{-}y}{\mathrm{Zn}}_{y}{\mathrm{O}}_{4}$，其中$x=0.115$和0.13，将y从0更改为0.10。在 $x=0.115,$ 无 Zn 样品中观察到的 Cu 自旋长程有序状态在 $x=0.13,$ 无 Zn 样品中消失，但在 $yg~0.0075 的 $x=0.13$ 的 Zn 取代样品中再次出现。对于两个 x 值，长程有序状态在 $yg0.03$ 时消失，因此 Cu 自旋为处于顺磁状态。目前的$\ensuremath{\mu}\mathrm{SR}$结果支持这样的建议：少量的非磁性杂质会产生自旋和空穴的动态条带相关性的钉扎，并使它们静态稳定，而大量的非磁性杂质会破坏条带相关性本身。
Zero-field muon-spin-relaxation $(\ensuremath{\mu}\mathrm{SR})$ measurements have been carried out in order to investigate the effect of nonmagnetic impurities on the dynamics of the Cu-spin fluctuations in the Zn-substituted ${\mathrm{La}}_{2\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{Cu}}_{1\ensuremath{-}y}{\mathrm{Zn}}_{y}{\mathrm{O}}_{4}$ with $x=0.115$ and 0.13, changing y from 0 to 0.10. A long-range-ordered state of Cu spins, which is observed in the Zn-free sample with $x=0.115,$ disappears in the Zn-free sample with $x=0.13,$ but appears again in the Zn-substituted samples with $x=0.13$ for $yg~0.0075.$ The long-range-ordered state disappears for $yg0.03$ for both values of x, so that the Cu spins are in a paramagnetic state. The present $\ensuremath{\mu}\mathrm{SR}$ results support the suggestion that a small amount of nonmagnetic impurities produces a pinning of the dynamical stripe correlations of spins and holes and make them statically stabilized, while a large amount of nonmagnetic impurities destroy the stripe correlations themselves.