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 |
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ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy(all)
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Ultrafast spin current generated by electron-magnon scattering in bulk of ferromagnets. / Shin, Im Hyuk; Min, Byoung Chul; Ju, Byeong Kwon; Choi, Gyung Min.
In: Japanese Journal of Applied Physics, Vol. 57, No. 9, 090307, 01.09.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Ultrafast spin current generated by electron-magnon scattering in bulk of ferromagnets
AU - Shin, Im Hyuk
AU - Min, Byoung Chul
AU - Ju, Byeong Kwon
AU - Choi, Gyung Min
PY - 2018/9/1
Y1 - 2018/9/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85053405567&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85053405567&partnerID=8YFLogxK
U2 - 10.7567/JJAP.57.090307
DO - 10.7567/JJAP.57.090307
M3 - Article
VL - 57
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 9
M1 - 090307
ER -