Bulk samples of RE1-xSrxMn1-yTMyO3 (RE=La, Pr, Nd, Sm ; TM= 3d transition metal) ceramics were prepared by using conventional ceramic techniques, and the magnetic/ electric properties and the magnetoresistance effects defined as Δρ/ρo = (ρH-ρo)/ρo where ρo is the zero field resistivity and pu is the resistivity in applied magnetic field, were systematically investigated. All studied samples ( x=l/3 ) showed perovskite-like structure. For examples, Pr2/3 St1/3 MnO3 sample sintered at 1573K showed MR ratio of -10% at room temperature, and Sm2/3 Sr1/3 MnO3 sample showed MR ratio of -80% at 77K. Then MR ratio tends to have a maximum around the Curie temperature of the sample. The MR values of the samples for substituting Mn of B-site ions by the other 3d transition metals, such as LaMn4/5 V1/5 O3 and LaMn4/5Cr1/5 O3 are -24% at 120Kand -15% at 140Krespectively.
- Isotropie perovskite-like ceramics
- MR peak temperature
- MR ratio
ASJC Scopus subject areas