We present results of neutron-scattering study of impurity effects on the static stripe correlations in La-based 214 high-T c cuprate. We found that the superlattice peaks from the charge-density-wave (CDW) order was induced by doping magnetic Fe ions in the low-temperature-orthorhombic (LTO) phase of La 2-x Sr x CuO 4 (LSCO). The spin-density-wave (SDW) order is also stabilized by Fe-doping, suggesting the appearance of stripe ordered state in the LTO phase, as is seen it the low-temperature-tetragonal (LTT) phase of La 1.875Ba 0.125Cu 4 (LBCO). Therefore, the stripe order can be potentially realized in the La-214 system irrespective of crystal structure. On the other hand, the onset temperature for the appearance of SDW and CDW orders is lowered by Zn-doping in La 1.875Ba 0.125CuO 4 system. This result suggests that the existing well-stabilized stripe order is degraded by substituting non-magnetic Zn ions.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics