TY - JOUR
T1 - Magnetization dynamics of a Fibonacci-distorted kagome artificial spin ice
AU - Frotanpour, Ali
AU - Woods, Justin
AU - Farmer, Barry
AU - Kaphle, Amrit P.
AU - De Long, Lance E.
AU - Giovannini, Loris
AU - Montoncello, Federico
N1 - Publisher Copyright:
© 2020 American Physical Society.
PY - 2020/12/29
Y1 - 2020/12/29
N2 - We present results of ferromagnetic resonance (FMR) experiments and micromagnetic simulations for a distorted, two-dimensional (2D) kagome artificial spin ice. The distorted structure is created by continuously modulating the 2D primitive lattice translation vectors of a periodic honeycomb lattice, according to an aperiodic Fibonacci sequence used to generate 1D quasicrystals. Experimental data and micromagnetic simulations show that the Fibonacci distortion causes broadening and splitting of FMR modes into multiple branches, which accompany the increasing number of segment lengths and orientations that develop with increasing distortion. When the applied field is increased in the opposite direction to the net magnetization of a segment, spin wave modes appear, disappear, or suddenly shift, to signal segment magnetization reversal events. These results show that the complex behavior of reversal events, as well as well-defined frequencies and frequency-field slopes of FMR modes, can be precisely tuned by varying the severity of the aperiodic lattice distortion. This type of distorted structure could therefore provide a tool for the design of complicated magnonic systems.
AB - We present results of ferromagnetic resonance (FMR) experiments and micromagnetic simulations for a distorted, two-dimensional (2D) kagome artificial spin ice. The distorted structure is created by continuously modulating the 2D primitive lattice translation vectors of a periodic honeycomb lattice, according to an aperiodic Fibonacci sequence used to generate 1D quasicrystals. Experimental data and micromagnetic simulations show that the Fibonacci distortion causes broadening and splitting of FMR modes into multiple branches, which accompany the increasing number of segment lengths and orientations that develop with increasing distortion. When the applied field is increased in the opposite direction to the net magnetization of a segment, spin wave modes appear, disappear, or suddenly shift, to signal segment magnetization reversal events. These results show that the complex behavior of reversal events, as well as well-defined frequencies and frequency-field slopes of FMR modes, can be precisely tuned by varying the severity of the aperiodic lattice distortion. This type of distorted structure could therefore provide a tool for the design of complicated magnonic systems.
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U2 - 10.1103/PhysRevB.102.224435
DO - 10.1103/PhysRevB.102.224435
M3 - Article
AN - SCOPUS:85099151420
SN - 2469-9950
VL - 102
JO - Physical Review B
JF - Physical Review B
IS - 22
M1 - 224435
ER -