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Updated: Jul 21, 2025

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
Generation of out-of-plane polarized spin current by spin swapping
Binoy K Hazra1, Banabir Pal1, Jae-Chun Jeon1
1Max Planck Institute of Microstructure Physics, Weinberg 2, 06120, Halle (Saale), Germany.
Researchers generated spin currents in chiral antiferromagnets like Mn3Sn. They found distinct in-plane and out-of-plane spin polarizations, crucial for spintronics applications in magnetic state manipulation.
Area of Science:
- Spintronics
- Condensed Matter Physics
- Materials Science
Background:
- Spintronics utilizes spin currents for magnetic state manipulation.
- Chiral antiferromagnets offer unique properties with negligible magnetization.
- Understanding spin current generation in these materials is key.
Purpose of the Study:
- Investigate spin current generation in chiral antiferromagnetic Mn3Sn films.
- Differentiate contributions to in-plane and out-of-plane spin polarization.
- Explore the role of the antiferromagnetic structure and interfaces.
Main Methods:
- Epitaxial thin film growth of Mn3Sn and permalloy.
- Temperature-dependent spin-torque ferromagnetic resonance (ST-FMR).
- Comparative studies with various non-magnetic metal interfaces.
Main Results:
- Robust spin current generation observed in Mn3Sn/permalloy heterostructures.
- In-plane spin polarization originates from Mn3Sn's chiral antiferromagnetic structure.
- Out-of-plane spin polarization arises from Mn3Sn/metal interface scattering (spin swapping).
Conclusions:
- The chiral antiferromagnetic order in Mn3Sn drives in-plane spin current.
- Interface effects, not antiferromagnetism, generate out-of-plane spin current.
- Spin swapping at interfaces is a general mechanism for out-of-plane spin currents.
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