Spin wave spectra in perpendicularly magnetized permalloy rings

Journal Article · Mon Mar 16 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4916029· OSTI ID:22395758

Zhou, X.; Ding, J.; Kostylev, M. ^[1]

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1. School of Physics, University of Western Australia, Crawley, Western Australia 6009 (Australia)

The dynamic behavior of perpendicularly magnetized permalloy circular rings is systematically investigated as a function of film thickness using broadband field modulated ferromagnetic resonance spectroscopy. We observed the splitting of one spin wave mode into a family of dense resonance peaks for the rings, which is markedly different from the single mode observed for continuous films of the same thickness. As the excitation frequency is increased, the mode family observed for the rings gradually converges into one mode. With the increase in the film thickness, a sparser spectrum of modes is observed. Our experimental results are in qualitative agreement with the dynamic micromagnetic simulations.

• OSTI ID: 22395758
• Journal Information: Applied Physics Letters, Vol. 106, Issue 11; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTROSCOPY
COMPUTERIZED SIMULATION
EXCITATION
FERROMAGNETIC RESONANCE
FILMS
MODULATION
PERMALLOY
RINGS
SPIN WAVES
THICKNESS