Effect of nitrogen upon enhancement of the magnetic Kerr rotation in ZnS(O,N)/TbFeCo bilayer films

Journal Article · Tue May 01 00:00:00 EDT 1990 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.344785· OSTI ID:6950228

Kudo, T; Johbetto, H; Ichiji, K ^[1]

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1. Hachioji Research Center, Casio Computer Co., Ltd. 2951-5, Ishikawa, Hachioji, Tokyo 192, Japan (JP)

In ZnS(O)/TbFeCo bilayer films, a large Kerr rotation angle of {theta}{sub {ital K}} ={minus}12{degree} 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 N{sub 2} flow rates in a mixture of sputtering Ar+N{sub 2} 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 N{sub 2} flow rate of 0.3 cm{sup 3}/min in the wavelength range 360--400 nm and the most enhanced Kerr rotation reaches {theta}{sub {ital K}} ={minus}17.5{degree} at {lambda}=373.5 nm. The strong enhancement of {theta}{sub {ital K}} is induced by a singular phenomenon in the optical-constant spectra of the ZnS(O,N) layer on the TbFeCo layer.

• OSTI ID: 6950228
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 67:9; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
CHALCOGENIDES
COBALT ALLOYS
DIELECTRIC PROPERTIES
ELECTRICAL PROPERTIES
ELEMENTS
FILMS
INORGANIC PHOSPHORS
IRON ALLOYS
KERR EFFECT
MAGNETO-OPTICAL EFFECTS
NITROGEN
NONMETALS
PHOSPHORS
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
SULFIDES
SULFUR COMPOUNDS
TERBIUM ALLOYS
ZINC COMPOUNDS
ZINC SULFIDES