Abstract
The effect of Fe doping in the Mn site on the magnetic, transport and structural properties of polycrystalline La 1/2Ca 1/2MnO 3 was studied. Doping with low Fe concentration (<10%) strongly affects electrical transport and magnetization. Long range charge order is disrupted even for the lowest doping level studied (∼2%). For Fe concentration up to 5% a ferromagnetic state develops at low temperature with metallic-like conduction and thermal hysteresis. In this range, the Curie temperature decreases monotonously as a function of Fe doping. Insulating behavior and a sudden depression of the ferromagnetic state is observed by further Fe doping.
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