Abstract
The ultrafast demagnetization of metallic ferromagnets can generate a spin current in metallic nonmagnets in a ferromagnet/nonmagnet structure. Two different mechanisms for this phenomenon have been suggested: spin-dependent transport of hot electrons and spin generation by electron-magnon scattering. In this work, we optically measure a transient spin accumulation on a nonmagnetic Cu layer driven by the ultrafast demagnetization of a ferromagnet (Fe, Co, and Ni). The modeling based on the spin generation by electron-magnon scattering in bulk ferromagnets (namely, bulk spin pumping) well explains the dynamics and magnitude of the measured spin accumulation on Cu.
| Original language | English |
|---|---|
| Article number | 090307 |
| Journal | Japanese Journal of Applied Physics |
| Volume | 57 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 2018 Sep 1 |
ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy(all)
Fingerprint Dive into the research topics of 'Ultrafast spin current generated by electron-magnon scattering in bulk of ferromagnets'. Together they form a unique fingerprint.
Cite this
Shin, I. H., Min, B. C., Ju, B. K., & Choi, G. M. (2018). Ultrafast spin current generated by electron-magnon scattering in bulk of ferromagnets. Japanese Journal of Applied Physics, 57(9), [090307]. https://doi.org/10.7567/JJAP.57.090307