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Keywords:

  • La0.7Ca0.3MnO3;
  • current-voltage characteristics

Abstract

The current-voltage characteristics of single crystalline and bicrystalline La0.7Ca0.3MnO3 films were measured and analyzed. Several epitaxial films, as well as 45° [001]-tilt grain boundaries, display current-voltage characteristics which are asymmetric with respect to polarity reversal of the bias current. One epitaxial film has a polarity dependent resistance of ∼340kΩ and of ∼670kΩ in forward and in reverse direction, respectively.