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- W2982298684 abstract "To understand the anomalous conductivity and colossal magnetoresistance effect of multiferroics CdCr2S4 around magnetic transition temperature TC, we propose the spin-pair correlation dependence of magnetic polarons model. In CdCr2S4, system shows the spontaneous magnetic order at TC and the magnetic order promotes the delocalization of magnetic polarons. According to the proposed model of a dual-conduction behavior, the normal and delocalized magnetic polarons coexist below TC due to the gradual delocalization process of magnetic polarons. Compared to the conductivity of normal magnetic polarons, the conductivity from the delocalized magnetic polarons is dominant. It is suggested that the spin-pair correlation modifies the hopping activation energy of delocalized polarons to realize the anomalous conductivity and colossal magnetoresistance effect. In addition, the applied magnetic field, which promotes the magnetic order and delocalization of magnetic polarons, also leads to the increase of conductivity via spin-pair correlation. It is found that the obtained conductivity and colossal magnetoresistance are in agreement with the experimental results." @default.
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- W2982298684 date "2019-10-01" @default.
- W2982298684 modified "2023-09-26" @default.
- W2982298684 title "Spin-pair correlation driven the colossal magnetoresistance effect in multiferroics CdCr<sub>2</sub>S<sub>4</sub>" @default.
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- W2982298684 doi "https://doi.org/10.1063/1.5125908" @default.
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