Magnetic and superconducting phase diagram ofBi2Sr3−xYxCu2O8as determined by muon-spin rotation

Muon-spin-rotation (${\mu }^{+}$SR) studies of ${\mathrm{Bi}}_2$ ${\mathrm{Sr}}_{3\mathrm{-}\mathrm{x}}$ ${\mathrm{Y}}_{\mathrm{x}}$ ${\mathrm{Cu}}_2$ ${\mathrm{O}}_{8+\mathit{y}}$ (x=0.3, 0.5, 0.6, 0.8, and 1.0) show that the magnetic ordering temperature $T_N$ falls rapidly with increasing hole concentration from $T_N$(x=1.0)=210 K to $T_N$(x=0.6)=10 K. In field-cooled high-field measurements ${\mathrm{Bi}}_2$ ${\mathrm{Sr}}_{2.7}$ ${\mathrm{Y}}_{0.3}$ ${\mathrm{Cu}}_2$ ${\mathrm{BO}}_{8+\mathit{y}}$ was found to be superconducting with $T_c$≊65 K. The resulting phase diagram reflects a transition from magnetic to superconducting phases with increasing hole concentration similar to that found in studies of ${\mathrm{YBa}}_2$ ${\mathrm{Cu}}_3$ ${\mathrm{O}}_{7\mathrm{-}\mathrm{\delta }}$ and ${\mathrm{La}}_{2\mathrm{-}\mathrm{x}}$ ${\mathrm{Sr}}_{\mathrm{x}}$ ${\mathrm{CuO}}_{4+\mathrm{y}}$. .AE