INVESTIGADORES
LEVY Pablo Eduardo
artículos
Título:
Resistive switching in ceramic multiferroicBi0.9Ca0.1FeO3
Autor/es:
DIEGO RUBI, FERNANDO GOMEZ-MARLASCA, PIERRE BONVILLE, DOROTHEE COLSON, AND PABLO LEVY
Revista:
PHYSICA B - CONDENSED MATTER
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2011 vol. 1 p. 1 - 4
ISSN:
0921-4526
Resumen:
Abstract
We report resistive switching effects in polycrystalline samples of the multiferroic Bi0.9Ca0.1FeO3
with silver electrodes. Mössbauer spectroscopy shows that upon
Ca-doping the Fe remains in a 3+ valence state, suggesting charge
compensation through the creation of large amounts of oxygen vacancies.
Electrical characterization shows that the oxide/metal resistance can be
switched between high and low resistance states by applying voltage
pulses. This process was shown to be forming free and a strong
relaxation after switching was found. We rationalize our results by
considering oxygen vacancies migration to and from the metaloxide
interface, resulting in variations of the Schottky potential barrier
height that modulate the interface resistance.