Abstract
Investigation of the electron-doped series Ca 1− x Sr x Mn 0.96Mo 0.04O 3 is reported. The magnetic, transport and structural properties have been characterized combining different techniques: X-ray diffraction, electron microscopy, magnetization, resistivity and thermopower measurements. For a constant small content of Mn +3 induced in the Mn +4 matrix by the Mo for Mn substitution, three crystallographic structures are evidenced, at room temperature, depending on the A-site size and the size mismatch effects. The influence of the structures on the transport and magnetic properties of these electron-doped manganites is presented. The optimization of the magnetoresistance and thermoelectric properties through the bandwidth parameter is presented.
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