We have performed elastic neutron scattering experiments on the superconductor La1.85Ho0.03Sr0.12CuO4 to study the effect of substitution of a cation with a large magnetic moment at La site on the static spin correlation. In the Ho-free sample with a hole concentration of 0.12, the spatially-modulated magnetic order is known to be stabilized at temperature below T spin ∼30 K. In the present Ho-doped sample, we found the appearance of magnetic peaks at (0.5, 0.5 ± 0.119, 0) positions below T spin ∼35 K, which is similar to the observation in the pristine sample. Furthermore, the volume-corrected intensities in the Ho-free and Ho-doped samples are comparable, suggesting a negligible effect of Ho-substitution at La sites. These results are quite a contrast to the huge enhancement of the magnetic intensity and the increase of T spin by substituting a comparable amounts of magnetic Fe3+ ions onto CuO2 planes. Therefore, the stability of the stripe order induced by the cation substitution is sensitive to the site at which the substitution occurs.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)