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- W1574161757 abstract "We have investigated effects of Zn and Ni on the Cu spin dynamics and superconductivity from the zero-field muon spin relaxation $(text{ZF-}ensuremath{mu}text{SR})$ and magnetic susceptibility $ensuremath{chi}$ measurements for ${text{La}}_{2ensuremath{-}x}{text{Sr}}_{x}{text{Cu}}_{1ensuremath{-}y}{(text{Zn},text{Ni})}_{y}{text{O}}_{4}$ with $x=0.15--0.20$, changing $y$ up to 0.10 in fine step. In the optimally doped $x=0.15$, it has been concluded that the formation of a magnetic order requires a larger amount of Ni than of Zn, which is similar to our previous results of $x=0.13$. From the estimation of volume fractions of superconducting (SC) and magnetic regions, it has been found for $x=0.15$ that the SC region is in rough correspondence to the region where Cu spins fluctuate fast beyond the $ensuremath{mu}text{SR}$ frequency window for both Zn- and Ni-substituted samples. According to the stripe model, it follows that, even for $x=0.15$, the dynamical stripe correlations of spins and holes are pinned and localized around Zn and Ni, leading to the formation of the static stripe order and the suppression of superconductivity. These may indicate an importance of the dynamical stripe in the appearance of the high-${T}_{c}$ superconductivity in the hole-doped cuprates. In the overdoped regime of $x=0.18$ and 0.20, on the other hand, the SC region seems to be in rough correspondence to the region where Cu spins fluctuate fast beyond the $ensuremath{mu}text{SR}$ frequency window, although it appears that the Cu spin dynamics and superconductivity are affected by the phase separation into SC and normal-state regions." @default.
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- W1574161757 date "2008-10-14" @default.
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- W1574161757 title "Effects of Zn and Ni substitution on the Cu spin dynamics and superconductivity inLa2−xSrxCu1−y(Zn,Ni)yO4(x=0.15–0.20): Muon spin relaxation and magnetic susceptibility study" @default.
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- W1574161757 doi "https://doi.org/10.1103/physrevb.78.134515" @default.
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