Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamic response of an artificial square spin ice   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.

23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio