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The phase constitution of Lay-xSrxMnO3 perovskite materials with [MATH] and [MATH] prepared by wet chemical techniques has been determined. Single phase La-deficient materials have been obtained at y=0.95 and [MATH] as well as for [MATH] and [MATH]. The observed variation of the lattice parameters leads to shrinking unit cell volume with Sr-content and with La-deficiency. Small polaron conduction has been observed for [MATH], while for [MATH] metallic-like behaviour is observed for La-deficient materials. The electrical conductivity of Sr-free materials at 950 °C approaches 100 S/cm. The activation energy for conduction changes strongly with sintering temperature and composition of the specimen

Structural and high temperature electrical properties of Lay-xSrxMnO3 perovskite materials

Structural and high temperature electrical properties of La_y-xSr_xMnO₃ perovskite materials