Abstract:
Abstract— A study for different samples of the compound of the
single Perovskite 0.67 0.33 3 La Ca MnO has been performed as a
function of grain size and investigated by X-ray Diffraction
(XRD), Scanning Electron Microscopy (SEM) and Electrical
Resistivity Measurement Setup (ERMS). It is found that the
crystal structure remains the same for all the samples, while the
grain size decreases with the increases of the grinding time and it
increases with sintering temperature. At the low temperature
measurement of resistivity, it is found that the values of the
metal–insulator transition temperature TMI depends upon the
grain size effect, whereas it decreases with the increases of the
grain size. The scattering process appears to be dominated by
electron–electron interaction process.
