Dynamic response of an artificial square spin ice

M. B. Jungfleisch; W. Zhang; E. Iacocca; J. Sklenar; J. Ding; W. Jiang; S. Zhang; J. E. Pearson; V. Novosad; J. B. Ketterson; O. Heinonen; A. Hoffmann

doi:10.1103/PhysRevB.93.100401

Dynamic response of an artificial square spin ice

M. B. Jungfleisch, W. Zhang, E. Iacocca, J. Sklenar, J. Ding, W. Jiang, S. Zhang, J. E. Pearson, V. Novosad, J. B. Ketterson, O. Heinonen, A. Hoffmann

Mathematics, Physics and Electrical Engineering

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Abstract

Magnetization dynamics in an artificial square spin-ice lattice made of Ni₈₀Fe₂₀ with magnetic field applied in the lattice plane is investigated by broadband ferromagnetic resonance spectroscopy. The experimentally observed dispersion shows a rich spectrum of modes corresponding to different magnetization states. These magnetization states are determined by exchange and dipolar interaction between individual islands, as is confirmed by a semianalytical model. In the low field regime below 400 Oe a hysteretic behavior in the mode spectrum is found. Micromagnetic simulations reveal that the origin of the observed spectra is due to the initialization of different magnetization states of individual nanomagnets. Our results indicate that it might be possible to determine the spin-ice state by resonance experiments and are a first step towards the understanding of artificial geometrically frustrated magnetic systems in the high-frequency regime.

Original language	English
Article number	100401(R)
Number of pages	5
Journal	Physical Review B
Volume	93
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevB.93.100401
Publication status	Published - 2 Mar 2016

Keywords

frustrated magnetism
magnetic monopoles
nanostructures
spin ice

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title = "Dynamic response of an artificial square spin ice",

abstract = "Magnetization dynamics in an artificial square spin-ice lattice made of Ni80Fe20 with magnetic field applied in the lattice plane is investigated by broadband ferromagnetic resonance spectroscopy. The experimentally observed dispersion shows a rich spectrum of modes corresponding to different magnetization states. These magnetization states are determined by exchange and dipolar interaction between individual islands, as is confirmed by a semianalytical model. In the low field regime below 400 Oe a hysteretic behavior in the mode spectrum is found. Micromagnetic simulations reveal that the origin of the observed spectra is due to the initialization of different magnetization states of individual nanomagnets. Our results indicate that it might be possible to determine the spin-ice state by resonance experiments and are a first step towards the understanding of artificial geometrically frustrated magnetic systems in the high-frequency regime.",

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author = "Jungfleisch, {M. B.} and W. Zhang and E. Iacocca and J. Sklenar and J. Ding and W. Jiang and S. Zhang and Pearson, {J. E.} and V. Novosad and Ketterson, {J. B.} and O. Heinonen and A. Hoffmann",

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T1 - Dynamic response of an artificial square spin ice

AU - Jungfleisch, M. B.

AU - Zhang, W.

AU - Iacocca, E.

AU - Sklenar, J.

AU - Ding, J.

AU - Jiang, W.

AU - Zhang, S.

AU - Pearson, J. E.

AU - Novosad, V.

AU - Ketterson, J. B.

AU - Heinonen, O.

AU - Hoffmann, A.

PY - 2016/3/2

Y1 - 2016/3/2

N2 - Magnetization dynamics in an artificial square spin-ice lattice made of Ni80Fe20 with magnetic field applied in the lattice plane is investigated by broadband ferromagnetic resonance spectroscopy. The experimentally observed dispersion shows a rich spectrum of modes corresponding to different magnetization states. These magnetization states are determined by exchange and dipolar interaction between individual islands, as is confirmed by a semianalytical model. In the low field regime below 400 Oe a hysteretic behavior in the mode spectrum is found. Micromagnetic simulations reveal that the origin of the observed spectra is due to the initialization of different magnetization states of individual nanomagnets. Our results indicate that it might be possible to determine the spin-ice state by resonance experiments and are a first step towards the understanding of artificial geometrically frustrated magnetic systems in the high-frequency regime.

AB - Magnetization dynamics in an artificial square spin-ice lattice made of Ni80Fe20 with magnetic field applied in the lattice plane is investigated by broadband ferromagnetic resonance spectroscopy. The experimentally observed dispersion shows a rich spectrum of modes corresponding to different magnetization states. These magnetization states are determined by exchange and dipolar interaction between individual islands, as is confirmed by a semianalytical model. In the low field regime below 400 Oe a hysteretic behavior in the mode spectrum is found. Micromagnetic simulations reveal that the origin of the observed spectra is due to the initialization of different magnetization states of individual nanomagnets. Our results indicate that it might be possible to determine the spin-ice state by resonance experiments and are a first step towards the understanding of artificial geometrically frustrated magnetic systems in the high-frequency regime.

KW - frustrated magnetism

KW - magnetic monopoles

KW - nanostructures

KW - spin ice

U2 - 10.1103/PhysRevB.93.100401

DO - 10.1103/PhysRevB.93.100401

M3 - Article

SN - 2469-9950

VL - 93

JO - Physical Review B

JF - Physical Review B

IS - 10

M1 - 100401(R)

ER -

Dynamic response of an artificial square spin ice

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Keywords

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