Magnetoresistance and current-induced electroresistance of the Ag / La0.67Ca0.33MnO3 interface

O. Kiprijanovič; A. Lučun; S. Ašmontas; F. Anisimovas; A. Maneikis; A. Sužiedėlis; B. Vengalis

O. Kiprijanovič
A. Lučun
S. Ašmontas
F. Anisimovas
A. Maneikis
A. Sužiedėlis
B. Vengalis

Abstract

Electrical properties of highly resistive Ag/La₀_.₆₇Ca₀_.₃₃MnO₃ interface were changed at 80 K by applying nanosecond electrical pulses to a couple of planar Ag electrodes magnetron sputtered onto La₀_.₆₇Ca₀_.₃₃MnO₃ thin films. The properties of the metal / manganite interface were investigated in a wide temperature range (T = 80–295 K) using various dc current values (1, 5, 10, 30, and 50 µA). We point out formation of highly resistive metastable states of the Ag/La₀_.₆₇Ca₀_.₃₃MnO₃ interface being sensitive to a weak current and demonstrating magnetoresistance and electroresistance phenomena, and also a presence of electrical memory effect. The investigations showed that combining properties of the interface and manganite film may have potential applications for creating new electronic devices.
Keywords: manganite thin films, magnetoresistance, electroresistance, metal/thin film interface, resistance switching
PACS: 73.63.Bd, 73.50.Fq, 75.47.Lx, 75.47.Gk