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A Brillouin light scattering study of the spin-wave magnetic field dependence in a magnetic hybrid system made of an artificial spin-ice structure and a film underlayer

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/5.0140866· OSTI ID:1983628
 [1];  [2];  [2];  [2];  [3];  [2]
  1. Università di Ferrara (Italy); University of Delaware
  2. University of Delaware, Newark, DE (United States)
  3. Istituto Officina dei Materiali del Consiglio Nazionale delle Ricerche (IOM-CNR), Perugia (Italy)
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We present a combined Brillouin light scattering (BLS) and micromagnetic simulation investigation of the magnetic-field-dependent spin-wave spectra in a hybrid structure made of permalloy (NiFe) artificial spin-ice (ASI) systems, composed of stadium-shaped nanoislands, deposited on the top of an unpatterned permalloy film with a nonmagnetic spacer layer. The thermal spin-wave spectra were recorded by BLS as a function of the magnetic field applied along the symmetry direction of the ASI sample. Magneto-optic Kerr effect magnetometry was used to measure the hysteresis loops in the same orientation as the BLS measurements. Here, the frequency and the intensity of several spin-wave modes detected by BLS were measured as a function of the applied magnetic field. Micromagnetic simulations enabled us to identify the modes in terms of their frequency and spatial symmetry and to extract information about the existence and strength of the dynamic coupling, relevant only to a few modes of a given hybrid system. Using this approach, we suggest a way to understand if the dynamic coupling between ASI and film modes is present or not, with interesting implications for the development of future three-dimensional magnonic applications and devices.
Research Organization:
University of Delaware, Newark, DE (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)
Grant/Contract Number:
SC0020308
OSTI ID:
1983628
Alternate ID(s):
OSTI ID: 1958347
Journal Information:
Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 8 Vol. 133; ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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Spin wave spectroscopy