Journal
JOURNAL OF APPLIED PHYSICS
Volume 123, Issue 24, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5030382
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Funding
- National Natural Science Foundation of China [61504052, 11774069]
- Natural Science Foundation of Jiangxi Province [2016BAB211006]
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Knowledge of the dynamic magnetic susceptibility of patterned films is of great importance for exploring future data-storage applications and microwave devices. Since ferromagnetic resonance frequency is a function of the geometric parameters of a certain magnetic system, in this work, we investigate by micromagnetic simulations a set of stripe-patterned FeGa films, which have an identical thickness of 10 nm but a varying width in the range of 30-80 nm and a varying length in the range of 200-1000 nm. Fast-Fourier transform analysis of the simulation results for ferromagnetic resonance calculation identifies two distinct resonance peaks, which are assigned to a bulk mode and an edge mode. The presence of stress-induced anisotropy significantly affects both the two resonant modes. The occupation area of the spreading magnetization near the stripe ends is controllable by a tensile or compressive stress applied along the strip width. Consequently, the dynamic susceptibility of FeGa can be adjusted by an applied stress. Published by AIP Publishing.
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