Electrical transport properties and superconducting critical temperature of Ln 1.85Ce 0.15CuO 4- y (Ln  Nd, Sm, Eu) under quasihydrostatic pressure up to 100 kbar

We have measured the resistivity of electron-doped superconductors Ln _1.85Ce _0.15CuO _{4- y} (Ln = Nd, Sm, Eu) under quasihydrostatic pressure up to 100 kbar. All the samples remain superconducting for this pressure. The ratio d log T_c/ d log V was found to be of the same order of magnitude as the one measured under hydrostatic pressure up to 20 kbar, weak and positive, in contrast with the hole doped high T_c superconductors. The effect of applied pressure on T_c does not compare with that of chemical pressure.