2020年11月9日
Laser stimulated THz emission from Pt/CoO/FeCoB
Applied Physics Letters
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- 巻
- 117
- 号
- 19
- 記述言語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1063/5.0020020
The antiferromagnetic order can mediate a transmission of the spin angular momentum flow, or the spin current, in the form of propagating magnons. In this work, we perform laser stimulated THz emission measurements on Pt/CoO/FeCoB multilayers to investigate the spin current transmission through CoO, an antiferromagnetic insulator, on a picosecond timescale. The results reveal a spin current transmission through CoO with the diffusion length of 3.0 nm. In addition, rotation of the polarization of the emitted THz radiation was observed, suggesting an interaction between the propagating THz magnons and the Néel vector in CoO. Our results not only demonstrate the picosecond magnon spin current transmission but also the picosecond interaction of the THz magnons with the Néel vector in the antiferromagnet.
- リンク情報
- ID情報
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- DOI : 10.1063/5.0020020
- ISSN : 0003-6951
- SCOPUS ID : 85096236903