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Updated: Nov 9, 2025

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

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Published on: August 21, 2018

Dynamic control of spin-wave propagation.

Jan-Niklas Toedt¹, Wolfgang Hansen²

¹Institute of Nanostructure and Solid State Physics, University of Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany. jtoedt@physnet.uni-hamburg.de.

Scientific Reports

|April 10, 2021

Summary

Researchers developed a method to control spin-wave packet propagation using magnetic fields. This technique allows for dynamic control, enabling the stopping and rebound of spin waves.

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Area of Science:

Condensed matter physics
Magnonics

Background:

Spin waves are fundamental excitations in magnetic materials.
Controlling spin-wave propagation is crucial for developing novel spintronic devices.

Purpose of the Study:

To present a novel method for dynamic control of spin-wave packet propagation.
To demonstrate the manipulation of spin-wave refraction and frequency using external magnetic fields.

Main Methods:

Utilizing a time-varying magnetic field to create a temporal inhomogeneity.
Investigating the refraction of spin waves at this inhomogeneity.
Analyzing the conservation of spin-wave impulse and frequency shifts.

Main Results:

Successfully demonstrated the dynamic control of spin-wave packet propagation.
Achieved refraction of spin waves at a spatially invariant temporal inhomogeneity.
Observed the stopping and rebound of a traveling Backward-Volume type spin-wave packet.

Conclusions:

The proposed method offers a new pathway for manipulating spin waves.
This technique has potential applications in developing advanced magnonic devices and information processing.
The ability to control spin-wave dynamics opens possibilities for novel functionalities.