Enhanced room temperature magnetoresistance response in textured La0.7Sr0.3MnO3 strips made by pulsed laser deposition

Abstract

Magnetoresistive La0.7Sr0.3MnO3 polycrystalline films have been deposited by high laser pulse energy pulsed laser deposition that exhibit an extreme variability in the temperature of the resistance maximum, Tp, as a function of the deposition conditions. Films have been deposited that exhibit the resistance maximum at temperatures ranging from 155 to 360 K as a function of laser pulse energy and shadowing conditions. High laser pulse energies, shadowing to eliminate film particulates, and a specific laser pulse rate range, were necessary to synthesize films with the temperature of the resistance maximum elevated to room temperature. The room temperature low field magnetoresistive response of samples with Tp approximately room temperature was highly anisotropic with respect to applied magnetic fields in plane and perpendicular to the plane. The (110) textured films exhibited an enhanced low field magnetoresistance compared to films with appreciable (111) texture.