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[WT]Phase structures, the transport and magnetic properties of the Perovskite-type manganite (La_ 0.8-xCe_xSr_ 0.2)_ 0.97 MnO_3 (x=0～0.26) prepared by La_2O_3 containing CeO_2 with different contents were studied. Experiments show that the compounds consist of a magnetic perovskite phase and non-magnetic CeO_2 and Mn_3O_4. The resistivity and magnetoresistance ratio (MR) of the samples vary with changing x. Their room-temperature MR reaches -3%～-14% at the magnetic field of 1 T. For x=0; x=0.037 and x=0.26 samples, the conductance keeps unchanged basically in a relatively wide temperature range above 600 K, and the result shows that it is feasible for producing SOFC cathode materials with these samples.
[WT] Phase structures, the transport and magnetic properties of the Perovskite-type manganite (La_0.8_xCe_xSr_0.2) _0.97 MnO_3 (x = 0~0.26) prepared by La_2O_3 containing CeO_2 with different contents were studied. Experiments show that the compounds consist of a magnetic perovskite phase and non-magnetic CeO 2 and Mn 3 O 4. The resistivity and magnetoresistance ratio (MR) of the samples vary with changing x. Their room-temperature MR reaches -3% ~ -14% at the magnetic field of 1 T For x = 0; x = 0.037 and x = 0.26 samples, the conductance keeps basically basically in a relatively wide temperature range above 600 K, and the results shows that it is feasible for producing SOFC cathode materials with these samples.