Antiferromagnetic spin correlations in (Nd,Pr${)}_{2\mathrm{-}\mathit{x}}$${\mathrm{Ce}}_{\mathit{x}}$${\mathrm{CuO}}_4$

Neutron-scattering measurements have been performed on (Nd,Pr${)}_{2\mathrm{-}\mathit{x}}$ ${\mathrm{Ce}}_{\mathit{x}}$ ${\mathrm{CuO}}_4$ (0.0<x<0.125) single crystals. All samples exhibit three-dimensional (3D) long-range magnetic order; the temperature dependence of the 2D magnetic correlation lengths in all is similar in character to that observed in pure and lightly doped ${\mathrm{La}}_2$ ${\mathrm{CuO}}_4$ albeit with renormalized spin stiffness constants ${\mathrm{\rho }}_{\mathit{s}}$. Thus, in the nonsuperconducting doping regime the hole- and electron-doped systems exhibit analogous magnetic behavior except for the drastically different dopant-concentration scales for the destruction of magnetic order.