In:
Journal of Applied Physics, AIP Publishing, Vol. 105, No. 7 ( 2009-04-01)
Abstract:
A new microfocused Brillouin light scattering (BLS) apparatus has been setup using a microscope objective with large numerical aperture and achieving a submicrometric lateral resolution, as inferred by reflectivity measurements taken on a set of calibration arrays consisting of Al stripes with different spacings. The micro-BLS apparatus has been then used to investigate the magnetic normal modes of elliptical Permalloy nanorings. The superiority of micro-BLS over conventional BLS measurements in the detection of stationary modes, especially those localized close to the edges of the nanoring where the internal field is highly nonhomogeneous, is demonstrated. A satisfactory interpretation of the measured spectra in terms of dynamical magnetization distribution inside the rings was achieved by a comparison with the output of dynamical micromagnetic simulations.
Type of Medium:
Online Resource
ISSN:
0021-8979
,
1089-7550
Language:
English
Publisher:
AIP Publishing
Publication Date:
2009
detail.hit.zdb_id:
220641-9
detail.hit.zdb_id:
3112-4
detail.hit.zdb_id:
1476463-5
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