ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
In ZnS(O)/TbFeCo bilayer films, a large Kerr rotation angle of θK =−12° has been detected at a short wavelength of 363 nm. The peak wavelength of the enhanced Kerr rotation is situated between the high transmittance region and the fundamental absorption region in the optical transmission spectrum of the ZnS(O) layer. The increase of the N2 flow rates in a mixture of sputtering Ar+N2 gases moves the threshold of the fundamental absorption in the ZnS(O,N) layer towards the shorter wavelengths. Under a constant thickness of the ZnS(O,N) layer, the peak position of the enhanced Kerr rotation for the ZnS(O,N)/TbFeCo bilayer films moves in the same way, too. The degree of Kerr rotation enhancement becomes maximum for the N2 flow rate of 0.3 cm3/min in the wavelength range 360–400 nm and the most enhanced Kerr rotation reaches θK =−17.5° at λ=373.5 nm. The strong enhancement of θK is induced by a singular phenomenon in the optical-constant spectra of the ZnS(O,N) layer on the TbFeCo layer.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.344785
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