Analysis in k-space of Magnetization Dynamics Driven by Strong Terahertz Fields

Claudio Serpico; Kumar Neeraj; Massimiliano d'Aquino; Matthias Hudl; Salvatore Perna; Stefano Bonetti; Valentino Scalera

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Analysis in k-space of Magnetization Dynamics Driven by Strong Terahertz Fields

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arxiv 2005.05742 v1 pith:74G74V57 submitted 2020-05-12 cond-mat.mes-hall

Valentino Scalera , Matthias Hudl , Kumar Neeraj , Salvatore Perna , Massimiliano d'Aquino , Stefano Bonetti , Claudio Serpico This is my paper · ORCID

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keywords dynamicsmagnetizationspinwavesdemagnetizationmagneticterahertzanalysis

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Demagnetization in a thin film due to a terahertz pulse of magnetic field is investigated. Linearized LLG equation in the Fourier space to describe the magnetization dynamics is derived, and spin waves time evolution is studied. Finally, the demagnetization due to spin waves dynamics and recent experimental observations on similar magnetic system are compared. As a result of it, the marginal role of spin waves dynamics in loss of magnetization is established.

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