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        Ho-doping Effect on the Incommensurate Magnetic Order in La1.88Sr0.12CuO4

        Masaki Fujita,Masanori Enoki,Kenji Tsutsumi,Satoshi Iikubo,Kazuyoshi Yamada 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12

        We have performed elastic neutron scattering experiments on the superconductorLa1.85Ho0.03Sr0.12CuO4 to study the effect of substitution of a cation with a large magnetic momentat 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 Tspin 30K. In the present Ho-doped sample, we found the appearance of magnetic peaks at (0.5, 0.5 ± 0.119, 0) positions below Tspin 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 tothe huge enhancement of the magnetic intensity and the increase of Tspin by substituting a comparableamounts of magnetic Fe3+ ions onto CuO2 planes. Therefore, the stability of the stripe orderinduced by the cation substitution is sensitive to the site at which the substitution occurs.

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