Temperature dependent intrinsic Gilbert damping in magnetostrictive FeCoSiB thin film

A low Gilbert damping factor is crucial for emerging magneto-acoustic devices. In current work, angle-dependent and temperature-dependent Gilbert damping of magnetostrictive FeCoSiB thin films have been investigated using electron spin resonance (ESR) and vector network analyzer ferromagnetic resona...

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Bibliographic Details
Published in:AIP advances 2023-02, Vol.13 (2), p.025003-025003-5
Main Authors: Hu, Wenbin, Zhang, Lei, Jin, Lichuan, Bai, Feiming
Format: Article
Language:English
Subjects:
Damping
Electron paramagnetic resonance
Electron spin
Ferromagnetic resonance
Ferromagnetism
Magnetostriction
Network analysers
Room temperature
Spin resonance
Temperature dependence
Thin films
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Summary:A low Gilbert damping factor is crucial for emerging magneto-acoustic devices. In current work, angle-dependent and temperature-dependent Gilbert damping of magnetostrictive FeCoSiB thin films have been investigated using electron spin resonance (ESR) and vector network analyzer ferromagnetic resonance (VNA-FMR) techniques, respectively. A very low Gilbert damping factor ∼0.0038 was measured with in-plane magnetic fields at room temperature. Temperature-dependent VNA-FMR results between 10 K and 300 K exhibit a conductivity-like damping feature, which can be attributed to the spin-orbital coupling dominantly controlled by the intraband scattering. Our results clearly indicate that highly magnetostrictive or piezomagnetic film does not necessarily have a high intrinsic damping factor.
ISSN:2158-3226
2158-3226
DOI:10.1063/9.0000418