Abstract
Ferromagnetic resonance (FMR) modes for Fe 70Co 30 magnetic nano-dots of 100 nm in diameter in a mono-domain state are studied under different in-plane and out-of-plane magnetic fields using a reflection measurement from a vector network analyzer with a coplanar wave guide (CPW VNA FMR) and a micromagnetics simulation. The observed real and imaginary parts of the reflection signal become a combination of symmetric and antisymmetric Lorentzian forms in FMR. The combinations are given different susceptibility components of χ xx and χ zx by changing the sample position on the CPW. The magnetic dots exhibit triple modes in FMR spectra from an influence of the demagnetization field distribution in the mono-domain state. The magnetic dots also show a different variation of FMR amplitude in χ xx and χ zx for an out-of-plane field increase.
Original language | English |
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Article number | 6187790 |
Pages (from-to) | 1782-1788 |
Number of pages | 7 |
Journal | IEEE Transactions on Magnetics |
Volume | 48 |
Issue number | 5 PART 1 |
DOIs | |
Publication status | Published - 2012 May |
Keywords
- Ferromagnetic resonance
- magnetic nano-dots
- micromagnetics simulation
- microwave assisted magnetic recording
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering