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Magnetic transport properties in iron/iron-oxide films |
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| Authors: | S.L. Ren B. You J. Du X.J. Bai J. Zhang W. Zhang A. Hu B. Zhang X.X. Zhang |
| Affiliation: | aNational Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, PR China bDepartment of Physics & Chemistry and Institute of Nano Science and Technology, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong |
| Abstract: | Iron/iron-oxide granular films were fabricated using reactive dc magnetron sputtering. Their structural, magnetic and transport properties were systematically studied. XPS and TEM confirmed the coexistence of Fe, FeO and Fe2O3. A metal–insulator transition was observed with the increasing of the oxygen component in the film. The temperature dependencies of longitudinal resistivity ρxx and anomalous Hall resistivity ρxy were discussed. We found the enhancement of ρxy and investigated the scaling law between anomalous Hall coefficient Rs and ρxx. In all the samples, Rs was found to be proportional to ρxx when ρxx is small, which indicated the skew scattering is dominant. |
| Keywords: | Sputtering Magnetic properties and measurements Metal–insulator transition Localization |
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