Magnetoresistive Core-Shell Nanowires

Magnetoresistive La0.67Sr0.33MnO3 nanowires have been synthesized and studied using pulsed laser deposition with MgO nanowires working as the template. Transport studies on these novel nanowires revealed a remarkable metal-insulator transition at 325 k, accompanied by room-temperature colossal magnetoresistance 10 percent under 1 T magnetic field. Furthermore, shape-induced magnetoresistance was observed for magnetic fields applied parallel or perpendicular to the nanowire. In addition, polycrystalline La0.67Sr0.33MnO3 have been obtained by tuning the synthesis condition, leading to a low-field magnetoresistance up to 16 percent at 0.06 T.