Surface- and tip-enhanced Raman spectroscopy reveals spin-waves in iron oxide nanoparticles

Raul D. Rodriguez, Evgeniya Sheremet, Tanja Deckert-Gaudig, Corinne Chaneac, Michael Hietschold, Volker Deckert, Dietrich R.T. Zahn

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Nanomaterials have the remarkable characteristic of displaying physical properties different from their bulk counterparts. An additional degree of complexity and functionality arises when oxide nanoparticles interact with metallic nanostructures. In this context the Raman spectra due to plasmonic enhancement of iron oxide nanocrystals are here reported showing the activation of spin-waves. Iron oxide nanoparticles on gold and silver tips are found to display a band around 1584 cm-1 attributed to a spin-wave magnon mode. This magnon mode is not observed for nanoparticles deposited on silicon (111) or on glass substrates. Metal-nanoparticle interaction and the strongly localized electromagnetic field contribute to the appearance of this mode. The localized excitation that generates this mode is confirmed by tip-enhanced Raman spectroscopy (TERS). The appearance of the spin-waves only when the TERS tip is in close proximity to a nanocrystal edge suggests that the coupling of a localized plasmon with spin-waves arises due to broken symmetry at the nanoparticle border and the additional electric field confinement. Beyond phonon confinement effects previously reported in similar systems, this work offers significant insights on the plasmon-assisted generation and detection of spin-waves optically induced.

Original languageEnglish
Pages (from-to)9545-9551
Number of pages7
JournalNanoscale
Volume7
Issue number21
DOIs
Publication statusPublished - 1 Jan 2015

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Spin waves
Iron oxides
Raman spectroscopy
Nanoparticles
Nanocrystals
Metal nanoparticles
Silicon
Silver
Nanostructured materials
Gold
Electromagnetic fields
Oxides
Raman scattering
Nanostructures
Physical properties
Chemical activation
Electric fields
ferric oxide
Glass
Substrates

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Rodriguez, R. D., Sheremet, E., Deckert-Gaudig, T., Chaneac, C., Hietschold, M., Deckert, V., & Zahn, D. R. T. (2015). Surface- and tip-enhanced Raman spectroscopy reveals spin-waves in iron oxide nanoparticles. Nanoscale, 7(21), 9545-9551. https://doi.org/10.1039/c5nr01277e

Surface- and tip-enhanced Raman spectroscopy reveals spin-waves in iron oxide nanoparticles. / Rodriguez, Raul D.; Sheremet, Evgeniya; Deckert-Gaudig, Tanja; Chaneac, Corinne; Hietschold, Michael; Deckert, Volker; Zahn, Dietrich R.T.

In: Nanoscale, Vol. 7, No. 21, 01.01.2015, p. 9545-9551.

Research output: Contribution to journalArticle

Rodriguez, RD, Sheremet, E, Deckert-Gaudig, T, Chaneac, C, Hietschold, M, Deckert, V & Zahn, DRT 2015, 'Surface- and tip-enhanced Raman spectroscopy reveals spin-waves in iron oxide nanoparticles', Nanoscale, vol. 7, no. 21, pp. 9545-9551. https://doi.org/10.1039/c5nr01277e
Rodriguez, Raul D. ; Sheremet, Evgeniya ; Deckert-Gaudig, Tanja ; Chaneac, Corinne ; Hietschold, Michael ; Deckert, Volker ; Zahn, Dietrich R.T. / Surface- and tip-enhanced Raman spectroscopy reveals spin-waves in iron oxide nanoparticles. In: Nanoscale. 2015 ; Vol. 7, No. 21. pp. 9545-9551.
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