Processing, device fabrication and electrical characterization of LaMnO3 nanofibers

Lanthanum manganite (LaMnO3) nanofibers were synthesized using electrospinning technique. The size and uniformity of these nanofibers were optimized by varying PVP concentration. X-ray diffraction analysis revealed the formation of single phase LaMn03 nanofibers (average diameter similar to 400 nm) when the composite nanofibers were calcined at 600 degrees C. M '' and Z '' spectroscopic plots of impedance spectroscopy data confirmed the presence of two distinct electro-active regions referred to as the grain and grain boundary regions. The activation energies of the grain and grain boundary regions were 0.27 eV and 0.41 eV, respectively; which suggested two different transport mechanisms in these fibers. (C) 2015 Elsevier Ltd. All rights reserved.