Magnetotransport Behaviors in Electron-Doped Manganese Oxide La0.9Te0.1MnO3

Guotai Tan; X. Zhang; Zhao Hui Chen

doi:10.4028/www.scientific.net/MSF.475-479.2259

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Magnetotransport Behaviors in Electron-Doped Manganese Oxide La_0.9Te_0.1MnO₃

Abstract:

The magnetotransport behaviors of electron-doped colossal magnetoresistance (CMR) manganites La0.9Te0.1MnO3 have been investigated in external magnetic fields up to 4 T. The temperature dependence of the resistivity shows that the transport mechanisms of the sample below the metal-insulator transition temperature are attributed to the electron-phonon and magnon scattering behaviors. While the resistivity above Curie temperature (Tc=240 K) can be fitted with either polaron transport or variable-range hopping, and the fitting results are affected significantly by the magnetic fields. The electron spin resonance investigation indicated that there exist the ferromagnetic clusters up to 280 K in the paramagnetic phase of the sample. As a result, a possible correlation between the resistivty and phase separation is considered.