Tunneling barrier in nanoparticle junctions of La2/3(Ca,Sr)1/3MnO3: Nonlinear current-voltage characteristics

NIEBIESKIKWIAT, D.; SÁNCHEZ, R.D.; LAMAS, D.G.; CANEIRO, A.; HUESO, L.E.; RIVAS, J.

JOURNAL OF APPLIED PHYSICS

AMER INST PHYSICS

Lugar: NY; Año: 2003 vol. 93 p. 6305 - 6310

0021-8979

The nonlinear current-voltage characteristics and voltage-dependent tunneling conductance in nanoparticles of La2/3A1/3MnO3 were studied. The powders were prepared by different wet-chemical routes and low calcination temperatures were used to obtain an average particle size. It was shown that a small fraction of the barriers contribute to the nonlinear transport, and the current is mainly carried out through low-resistive percolated paths.