Temperature-dependent anisotropic magnetoresistance inversion behaviors in Fe3O4 films
| Autor: | Jin Pyo Hong, Kap Soo Yoon |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Magnetoresistance Condensed matter physics Scattering 02 engineering and technology Electron 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Electrical resistivity and conductivity 0103 physical sciences Spin diffusion Electrical measurements Thin film 010306 general physics 0210 nano-technology Anisotropy |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 423:7-11 |
| ISSN: | 0304-8853 |
| DOI: | 10.1016/j.jmmm.2016.09.067 |
| Popis: | We address the abnormal anisotropic magnetoresistance (AMR) reversal feature of half-metallic polycrystalline Fe 3 O 4 films occurring at a specific temperature. Experimental results revealed a positive to negative MR transition in the Fe 3 O 4 films at 264 K, which reflect the influence of additional domain wall scattering. These features was described by a correlation between domain wall resistance and inversion behavior of AMR with additional domain wall scattering factors. We further describe a possible model based on systematic structural and electrical measurements that employs a temperature-dependent domain wall width and spin diffusion length of the conducting electrons. This model allows for spin-flipping scattering of spin polarized electrons inside a proper domain width. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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