The effect of resistive switching in doped manganites being in theferromagnetic state has been studied using resistive and magneto-optic methods.The visualization of magnetic structure of La0.75Sr0.25MnO3-x single crystals,and its transformation under electric current proposed local superheating ofthe material above the Curie temperature, which was supported by numericalcalculation. The obtained results suggest a significant role ofmicrometer-scale inhomogeneity of manganites in phase separation, magnetic andtransport properties of the material.
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