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    Rights statement: Copyright 2020 American Institute of Physics. The following article appeared in Applied Physics Letters, 117, 2020 and may be found at http://dx.doi.org/10.1063/5.0020020 This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

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Laser stimulated THz emission from Pt/CoO/FeCoB

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Article number192403
<mark>Journal publication date</mark>9/11/2020
<mark>Journal</mark>Applied Physics Letters
Issue number19
Volume117
Number of pages5
Publication StatusPublished
<mark>Original language</mark>English

Abstract

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.

Bibliographic note

Copyright 2020 American Institute of Physics. The following article appeared in Applied Physics Letters, 117, 2020 and may be found at http://dx.doi.org/10.1063/5.0020020 This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.