Site-Dilution in quasi one-dimensional antiferromagnet Sr2(Cu1-xPdx)O3: reduction of Neel Temperature and spatial distribution of ordered moment sizes

The discovery of high-Tc cuprates has prompted theoretical and experimental investigations of lowdimensional spin systems with spin quantum number S = 1/2. There were a series of neutron diffraction studies reported in the high-Tc cuprate La2−xSrxCuO4 [1, 2], in which the dynamical spin correlation was measured. It was found that the inverse correlation length � −1 (x,T) may be divided into the two terms: the temperature independent term � −1 (x,0) which is purely determined by the doping concentration and the doping independent term � −1 (0,T) which follows the universal �