Plasmon-induced demagnetization and magnetic switching in nickel nanoparticle arrays

Mikko Kataja, Francisco Freire-Fernández, Jorn P. Witteveen, Tommi K. Hakala, Päivi Törmä, Sebastiaan Van Dijken*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)
126 Downloads (Pure)

Abstract

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
Volume112
Issue number7
DOIs
Publication statusPublished - 12 Feb 2018
MoE publication typeA1 Journal article-refereed

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