Bandwidth-control-induced insulator-metal transition in ${\mathrm{Pr}}_{0.65}$(${\mathrm{Ca}}_{1\mathrm{-}\mathrm{y}}$${\mathrm{Sr}}_{\mathrm{y}}$${)}_{0.35}$${\mathrm{MnO}}_3$ and ${\mathrm{Pr}}_{0.7}$${\mathrm{Ca}}_{0.3}$${\mathrm{MnO}}_3$

Both internal chemical pressure by ion substitution and external hydrostatic pressure induce an insulator-to-metal (I-M) transition in the ${\mathrm{Pr}}_{1\mathrm{-}\mathrm{x}}$ ${\mathrm{Ca}}_{\mathrm{x}}$ ${\mathrm{MnO}}_3$ system. The behavior of spin and charge ordering through the I-M transition has been studied with use of neutron diffraction techniques. As a function of effective pressure, we identify three different pressure regions for the low-temperature state.