Structural and Magnetic Properties of Hole‐Doped (La0.56Ce0.14)Sr0.30MnO3 Perovskite.

Abstract We have successfully prepared a single-phase Ce-doped sample (La 0.56 Ce 0.14 )Sr 0.30 MnO 3 by a solid-state route, without CeO 2 oxide segregation. Compared to the undoped sample La 0.70 Sr 0.30 MnO 3 , the structure remains hexagonal with R 3 ¯ c space group without a large variation of the cell parameters and volume. The thermal variation of the magnetization shows that the Ce-doped sample exhibits a ferromagnetic to paramagnetic transition at 357 K and an anti-ferromagnetic coupling below 100 K between the ferromagnetic Mn moments and the Ce moments and thus form a ferrimagnetic ground state. Comparing our results to those of the literature, we can suggest that the cerium ions are in a trivalent state (Ce 3+ ) and the anomalous behaviour attributed to a Kondo-like effect.