Journal
PHYSICAL REVIEW MATERIALS
Volume 3, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevMaterials.3.051402
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Funding
- JSPS KAKENHI Grants [17H04924, 15H05702, 17H04795, 18H01859, 17H05181]
- Collaborative Research Program of Institute for Chemical Research, Kyoto University [2018-61]
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In antiferromagnetic spintronics where manipulation of the antiferromagnetic spins is a central technological challenge, it is important to understand the dynamic properties, especially their THz spin dynamics and the magnetic damping. Here, we investigate thoroughly the antiferromagnetic spin dynamics in NiO by broadband THz spectroscopy and find the remarkable difference in the damping constants alpha = 5.0 +/- 0.4 x 10(-4) and 7.4 +/- 0.4 x 10(-4), respectively, for mono- and polycrystalline NiO, indicating the existence of strong extrinsic contributions to the damping, such as two-magnon scattering. Our results shed light on the mechanism of the antiferromagnetic dissipative dynamics and give important insights for developing antiferromagnetic and THz spintronics devices.
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