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- W1495468045 abstract "Abstract The resistivity ρ ( T ) , and thermoelectric power (TEP) S ( T , H ) in the manganite La0.85Te0.15Mn0.9Cu0.1O3 have been investigated systematically in the absence and presence of magnetic fields. A large negative magnetoresistance (MR) appears up to 5 T. In addition, S ( T ) of the sample shows an anomalous peak, which is suggested to be related to the contribution of phonon drag. Particularly, the thermally induced and the field-induced sign change of S below the Curie temperature T C is observed, implying the importance of spin polarization. In terms of the change of electronic structure, the orbital degree of freedom of the e g carriers can be responsible for the effective lifting of the degenerate e g band. Additionally, based on the fitting results of ρ ( T ) and S ( T ) , the transport mechanism for the sample in the paramagnetic (PM) insulting region and low-temperature ferromagnetic (FM) insulating region below T C is suggested to be dominated by variable-range-hopping (VRH) conduction. However, in the intermediate-temperature FM metallic region below T C , the transport mechanism is considered to be dominated mainly electron–magnon scattering." @default.
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- W1495468045 date "2006-11-01" @default.
- W1495468045 modified "2023-09-27" @default.
- W1495468045 title "Spin polarization and transport in the manganite La0.85Te0.15Mn0.9Cu0.1O3" @default.
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- W1495468045 doi "https://doi.org/10.1016/j.physleta.2006.05.093" @default.
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