Journal
APPLIED PHYSICS LETTERS
Volume 105, Issue 24, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4904225
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Funding
- KAKENHI [24686038, 26289083]
- MEXT
- Japan Science and Technology Agency (JST)
- Storage Research Consortium in Japan
- Grants-in-Aid for Scientific Research [24686038, 26289083] Funding Source: KAKEN
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Anomalous Hall effect (AHE) based ferromagnetic resonance (FMR) measurements were carried out on perpendicularly magnetized Co/Pt multilayer single dots of 0.4-3 mu m 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 mu m 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. (C) 2014 AIP Publishing LLC.
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