Electrical transport and glassy response in strained thin La0.7Ca0.3MnO3 films

摘要

Magnetotransport properties of La0.7Ca0.3MnO3 thin films deposited on (100)LaAlO3 substrate were investigated. The balance between the charge orderedinsulating phase and ferromagnetic metallic phase may account for a number ofglassy features such as: significant hysteresis, memory effects and long-timeresistivity relaxation. It was found that the resistance of La0.7Ca0.3MnO3 thinfilm decreases significantly upon applying electric current, in a widetemperature range 10 - 220 K. The magnetotransport properties of the strainedthin films are discussed in the context of cross-coupling of charge, spin andstrain.