Magnetic field dependence of electrical resistivity in fine grain La0.75Ca0.25MnO3

Structural and magneto-transport studies show that a shift of the electrical resistivity peak to lower temperature is due to a fine grain structure of the La0.75Ca0.25MnO3 manganite. An influence of external magnetic field on transport processes is analysed. (c) 2004 Elsevier B.V. All rights reserved.