Properties of La1 − xSrxMn0.925Zn0.075O3 (x = 0.075, 0.095, 0.115) ceramics

The EPR spectra and conductivity of La 1 − x Sr x Mn 0.925 Zn 0.075 O 3 ( x = 0.075, 0.095, 0.115) ceramics with a crystal structure examined by X-ray diffraction have been studied. At x = 0.095, a pronounced magnetic-field dependence of the electrical resistivity has been revealed in the temperature range from 190 to 228 K. For samples with x = 0.075 and 0.115, no similar behavior has been observed. The EPR linewidth linearly increases with increasing temperature in the range from 180 to 380 K for all the samples; the slope decreases as the strontium concentration increases.