Abstract
The electrical conductivity and ordinary Hall resistivity of perovskite Mn oxides are studied in the moment expansion method by using a model where a strong Hund coupling exists between localized spins and correlated itinerant electrons. It is shown that, in the strong-coupling limit of the model, both the conductivity and Hall resistivity increase in proportion to M 2, where M is the induced magnetization, and that the Hund coupling enhances their M dependence.
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