Spin-dependent transport in phase-separated manganites
Kugel, K. I. · Rakhmanov, A. L. · Sboychakov, A. O. · Kagan, M. Yu. · Brodsky, I. V. · Klaptsov, A. V.
Original · EN
Starting from the assumption that ferromagnetically correlated regions exist in manganites even in the absence of long-range magnetic order, we construct a model of charge transfer due to the spin-dependent tunnelling of charge carriers between such regions. This model allows us to analyze the temperature and magnetic field dependence of resistivity, magnetoresistance, and magnetic susceptibility of phase-separated manganites in the temperature range corresponding to non-metallic behavior. The comparison of theoretical and experimental results reveals the main characteristics of the phase-separated state.
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