Theory of spin and lattice wave dynamics excited by focused laser pulses

Journal article (2018)

Authors

K. Shen Kavli institute of nanoscience Delft, Beijing Normal University, QN/Bauer Group - AS
G.E. Bauer Tohoku University, QN/Bauer Group - AS , Kavli institute of nanoscience Delft
Research Group
QN/Bauer Group (AS) (TU Delft)
Copyright: © 2018 K. Shen, G.E. Bauer
DOI: https://doi.org/10.1088/1361-6463/aabd68
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Published Date

2018

Language

English

Reuse Rights

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Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Research Group

QN/Bauer Group

Abstract

We develop a theory of spin wave dynamics excited by ultrafast focused laser pulses in a magnetic film. We take into account both the volume and surface spin wave modes in the presence of applied, dipolar and magnetic anisotropy fields and include the dependence on laser spot exposure size and magnetic damping. We show that the sound waves generated by local heating by an ultrafast focused laser pulse can excite a wide spectrum of spin waves (on top of a dominant magnon-phonon contribution). Good agreement with recent experiments supports the validity of the model.

Files

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