Articles you may be interested inEvidence of localized surface plasmon enhanced magneto-optical effect in nanodisk array Appl. Phys. Lett. 96, 081915 (2010); 10.1063/1.3334726Magneto-optical spectroscopy study of the solid-state reaction in Ti/Ni multilayered films Magnetooptical Faraday effect of porous films comprised of cobaltsubstituted barium ferrite fine particles dispersed in a resinWe have studied Faraday rotation and magnetic properties of Co-Ti substituted barium ferrite films with perpendicular anisotropy, which were prepared by targets-facing-type sputtering method on ( 111) oriented GGG substrates. Faraday rotation «(J F) of 500-830 nm was measured by using the Faraday modulation method. It was found that fiF increased proportionally to the content of cobalt in the wavelength range 700-830 nm. In the BaFe lO .42 CO O . 78 Ti o . s 0 19 fi1m, Faraday rotation and magnetic properties were as fonows: OF = 0.75 deg/pm at 780 nm, anisotropy field: Hk = 5.2 kOe, coercive force: He = 800 Oe, Curie temperature: Tc = 380 ·C. Thermomagnetic recording was achieved on this film by using a 780-nm laser diode. As a result, 2.0-pm bit patterns were observed by Faraday effect.

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We have studied on the application of Ba-ferrite(BaFe12O19) to magneto-optical recording. It was found that CoTi substituted Ba-ferrite(BaCoxTixFe12-2xO19) films on GGG single crystals had Faraday rotation of 0.9deg/ µ m(λ=780nm) and Curie temperature of 320°C at X=0.9. And CoTi substituted Ba-ferrite films with the perpendicular magnetic anisotropy were obtained on glass substrate by using (111) orientated NiZn-ferrite(NixZn1-xFe2O4) films for under layer. From these results, Ba-ferrite magneto-optical recording medium which constitution is glass substrate, NiZn-ferrite under layer, CoTi substituted Ba-ferrite magnetic layer and stripe-shaped metal reflective layer for the guide tracks, is proposed from the optimization of each layer.

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