Forming of structure and properties during sintering of manganite nanopowders (La <sub>0,65</sub>Sr <sub>0,35</sub>) <sub>0,8</sub>Mn <sub>1,2</sub>O <sub>3</sub> <sub>± Δ </sub>и La <sub>0,7</sub>Mn <sub>1,3</sub>O <sub>3 ± Δ</sub>
In this paper the samples of manganite ceramics with varying disorder in the grain boundaries were sintered using nanopowders of various sizes (from 6 to 200 nm). The dependence of the resistivity, magnetoresistivity and dynamic magnetic susceptibility on the initial size of the powders was found. Based on the analysis of the density and resistivity of the samples concluded that impurity distribution in the grains of ceramics has significant role.