Evidence of phase separation in Nd_1-xSr_xMnO₃(x=0.50, 0.51, 0.52, 0.53, 0.54, 0.55)

The temperature dependence of Mn ion magnetization and the conductivity difference versus temperature provide phase separation evidence in Nd_1-xSr_xMnO_3(x=0.50, 0.51, 0.52, 0.53, 0.54, 0.55). This is different from other reports and may suggest that a fully charge-ordered state exists in quite a narrow range; the sample preparation procedure affects the charge ordering. The polaron effect also plays an important role in explaining the conductivity.