Unraveling the temperature-dependent spin-polarized electron transport in iron via spin-wave Doppler shift
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arXiv
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| Auteurs principaux: | , , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866913645695336448 |
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| author | Solano, José Rossi, Quentin Robert, Jerome Lenertz, Marc Henry, Yves Gobaut, Benoit Halley, David Bailleul, Mattieu |
| author_facet | Solano, José Rossi, Quentin Robert, Jerome Lenertz, Marc Henry, Yves Gobaut, Benoit Halley, David Bailleul, Mattieu |
| contents | An electric current flowing in a ferromagnetic metal carries spin angular momentum, i.e. it is spin-polarized. Here, we measure the spin-wave Doppler shift induced by the transfer of angular momentum from the diffusive spin-polarized electric current onto coherent spin waves in epitaxial MgO/Fe/MgO thin films. We follow this Doppler shift as function of the temperature and determine that the degree of spin-polarization of the current increases from 77$\%$ to 86$\%$ when cooling the device from 303K down to 10K. Interpreting these measurements within the two-current model, we separate the contributions from electron-surface, electron-phonon and electron-magnon scatterings to the spin-dependent resistivity of Fe. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_20531 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Unraveling the temperature-dependent spin-polarized electron transport in iron via spin-wave Doppler shift Solano, José Rossi, Quentin Robert, Jerome Lenertz, Marc Henry, Yves Gobaut, Benoit Halley, David Bailleul, Mattieu Materials Science Other Condensed Matter An electric current flowing in a ferromagnetic metal carries spin angular momentum, i.e. it is spin-polarized. Here, we measure the spin-wave Doppler shift induced by the transfer of angular momentum from the diffusive spin-polarized electric current onto coherent spin waves in epitaxial MgO/Fe/MgO thin films. We follow this Doppler shift as function of the temperature and determine that the degree of spin-polarization of the current increases from 77$\%$ to 86$\%$ when cooling the device from 303K down to 10K. Interpreting these measurements within the two-current model, we separate the contributions from electron-surface, electron-phonon and electron-magnon scatterings to the spin-dependent resistivity of Fe. |
| title | Unraveling the temperature-dependent spin-polarized electron transport in iron via spin-wave Doppler shift |
| topic | Materials Science Other Condensed Matter |
| url | https://arxiv.org/abs/2412.20531 |