Static and dynamic magnetic properties of Ni80 Fe20 square antidot arrays

Tse, D. H. Y., Steinmuller, S. J., Trypiniotis, T., Anderson, D., Jones, G. A. C., Bland, J. A. C. and Barnes, C. H. W. (2009) Static and dynamic magnetic properties of Ni80 Fe20 square antidot arrays. Physical Review B, 79 5: . doi:10.1103/PhysRevB.79.054426


Author Tse, D. H. Y.
Steinmuller, S. J.
Trypiniotis, T.
Anderson, D.
Jones, G. A. C.
Bland, J. A. C.
Barnes, C. H. W.
Title Static and dynamic magnetic properties of Ni80 Fe20 square antidot arrays
Formatted title
Static and dynamic magnetic properties of Ni80 Fe20 square antidot arrays
Journal name Physical Review B   Check publisher's open access policy
ISSN 1098-0121
2469-9950
2469-9969
Publication date 2009-02-01
Year available 2009
Sub-type Article (original research)
DOI 10.1103/PhysRevB.79.054426
Open Access Status Not yet assessed
Volume 79
Issue 5
Total pages 9
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Formatted abstract
We have investigated both static and dynamic magnetic properties of square antidot arrays in a ferromagnetic thin-film structure of Au (2 nm)/ Ni80 Fe20 (27.6 nm) on a SiO2 500 nm/Si substrate using magneto-optic Kerr effect magnetometry, Brillouin light scattering (BLS), and micromagnetic simulations. The antidot patterns were 1 μm square holes arranged in two separate square lattices of dot separations d=0.6 μm and 1.0 μm. The introduction of antidots induced an in-plane fourfold magnetic anisotropy with hard axes on the two nearest-antidot-neighbor directions. The coercive field, Hc, was increased by the presence of antidots. Fixed-frequency modes were observed in spin-wave dispersion relations in remanent spin configurations. These modes correspond to spin-wave confinement by antidot edges, which were seen as a series of nodal lines parallel to the edges in simulated spin-wave mode spatial mappings. Domains in remanent states, some of which were responsible for the existence of dipole-exchange backward volume modes seen in BLS spectra, were also found to confine spin waves in simulations.
Keyword Physics, Condensed Matter
Physics
PHYSICS, CONDENSED MATTER
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Centre for Advanced Imaging Publications
 
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