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Precise neutron-scattering experiments onLa$_{1.88-y}$Sr$_{0.12+y}$Cu$_{0.99}$R$_{0.01}$O$_4$ ($y$=0 for R=Cu, Zn and$y$=0.01 for R=Ga, Fe) were performed to examine the stability of stripe orderin cuprate oxides through impurity substitution effects. For all theimpurity-substituted samples a static charge-density-wave order similar to thatreported in the low-temperature-tetragonal phase (LTT) was discovered in thelow-temperature-orthorhombic (LTO) phase for the first time. Fe substitutionsignificantly enhanced both the charge- and spin-density-wave orders. Theseresults indicate that dynamical charge stripes can be stabilized into staticones around the Cu-site defects regardless of the type of crystal structure.Additionally, large magnetic moments at the Cu-site may induce a decrease inthe Cu spin fluctuations around the defects, which in turn, enhances the staticcharge-density-wave order.

Gigantic Impact of Magnetic Impurity on Stripe Order in La$_{2-x}$Sr$_{x}$CuO$_4$ ($x$$\sim$1/8)