Enhanced colossal electroresistance in Cu/Pr0.7Ca0.3MnO3/Cu structure

Voltage-current (V-I) curves have been measured in symmetrical metal/Pr0.7Ca0.3MnO3/metal structures with metal=Ag, Cu, Pt, and Au. Our four measured samples exhibit room-temperature nonlinear and asymmetric V-I curves with electrical hysteresis loops. Among these four samples, Cu/Pr0.7Ca0.3MnO3/Cu produces the largest hysteresis loop, yielding an enhanced colossal electroresistance of 2279% at a current of 0.5 A.