Quantized spin waves in single Co/Pt dots detected by anomalous Hall effect based ferromagnetic resonance

N. Kikuchi, M. Furuta, S. Okamoto, O. Kitakami, T. Shimatsu

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Anomalous Hall effect (AHE) based ferromagnetic resonance (FMR) measurements were carried out on perpendicularly magnetized Co/Pt multilayer single dots of 0.4-3 μm in diameter. The resonance behavior was measured by detecting the decrease of perpendicular magnetization component due to magnetization precession. Resonance behavior was observed as a clear decrease of Hall voltages, and the obtained resonance fields were consistent with the results of vector-network-analyzer FMR. Spin-waves with cylindrical symmetry became significant by decreasing the dot diameter, and quantized multiple resonances were observed in the dot of 0.4 μm in diameter. The AHE based FMR proposed here is a powerful method to approach magnetization dynamics including spin waves and non-linear behavior excited in a finite nanostructure.

Original languageEnglish
Article number242405
JournalApplied Physics Letters
Volume105
Issue number24
DOIs
Publication statusPublished - 2014 Dec 15

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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