Abstract

Lithium (50%) mixed layered Na2Ti3O7 and its 0.01, 0.05 & 1.0 molar percentage CuO doped derivatives have
been prepared through high temperature solid state reaction and characterized through X- ray diffractometer,
d.c. conductivity in the temperature range 373-700K and room temperature EPR investigation. Room
temperature X-ray diffratograms confirm the phase evolution. Room temperature electron paramagnetic
resonance (EPR) data show that Cu2+ occupies Ti4+ lattice sites giving rise to electric dipoles which increases
electric permittivity. The absorption peak in EPR spectra gets broadened due to increased exchange interaction
in heavily doped derivatives. Four distinct regions have been identified in the Ln(
T) versus 1000/T plots.
Various electrical conduction mechanisms have involved during the whole temperature range of study.