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Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

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Spin-current emission governed by nonlinear spin dynamics.

Takaharu Tashiro¹, Saki Matsuura¹, Akiyo Nomura¹

¹Department of Applied Physics and Physico-Informatics, Keio University, Yokohama 223-8522, Japan.

Scientific Reports

|October 17, 2015

Summary

This summary is machine-generated.

Nonlinear magnetization dynamics in magnetic insulators generate spin currents. Decreasing temperature enhances this emission via magnon scattering, crucial for spintronic devices.

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Area of Science:

Spintronics
Condensed Matter Physics
Materials Science

Background:

Conduction electron and localized magnetization coupling drives spintronic phenomena.
Dynamical magnetization can generate spin currents.
Nonlinear magnetization dynamics offer a route for nonlinear spin-current generation.

Purpose of the Study:

Demonstrate spin-current emission governed by nonlinear magnetization dynamics.
Investigate the role of nonlinear magnon interactions in spin-current emission.

Main Methods:

Utilized a metal/magnetic insulator bilayer structure.
Probed spin-current emission using the inverse spin Hall effect.
Analyzed temperature and excitation power dependencies of voltage generation.

Main Results:

Observed nonlinear magnetization dynamics and spin-current emission.
Demonstrated nontrivial temperature and excitation power dependences.
Found that decreasing temperature triggers enhanced spin-current emission due to magnon scatterings.

Conclusions:

Nonlinear magnon interactions play a crucial role in spin-current emission from magnetic insulators.
Dynamical magnetization and nonequilibrium magnons are key drivers.
Results highlight potential for novel spintronic device applications.