Plasmon-induced demagnetization and magnetic switching in nickel nanoparticle arrays

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We report on the manipulation of magnetization by femtosecond laser pulses in a periodic array of cylindrical nickel nanoparticles. By performing experiments at different wavelengths, we show that the excitation of collective surface plasmon resonances triggers demagnetization in zero field or magnetic switching in a small perpendicular field. Both magnetic effects are explained by plasmon-induced heating of the nickel nanoparticles to their Curie temperature. Model calculations confirm the strong correlation between the excitation of surface plasmon modes and laser-induced changes in magnetization.


Original languageEnglish
Article number072406
Pages (from-to)1-5
JournalApplied Physics Letters
Issue number7
Publication statusPublished - 12 Feb 2018
MoE publication typeA1 Journal article-refereed

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