Semiconductor Physics, Quantum Electronics & Optoelectronics. 2002. V. 5, N 2. P. 217-221.

PACS: 78.-s; 81.15.-z

Optical and magneto-optical properties of thin films for high density information recording

V.G. Kravets¹⁾, L.V. Poperenko²⁾, I.V. Yurgelevich²⁾, A. K. Petford-Long³⁾

1)Institute for Information Recording, 2 Shpak St, 03113 Kyiv, Ukraine
2)Department of Physics, Taras Shevchenko Kyiv University, 6 Av. Acad. Glushkov, 03022 Kyiv, Ukraine
3)Department of Materials, University of Oxford, Oxford OX1 3PH, United Kingdom

Abstract. It was found that optical and magneto-optical (MO) properties of thin film materials have potential application for blue laser recording. For this purpose, we have used a combination of ellipsometric and polar MO Kerr effect measurements. The optical and magneto-optical properties of Mn(Sb_1-xBi_x) and Co-Pt nanocrystalline films were investigated for incident photons in the energy range from 1.3 to 4.0 eV. A large Kerr rotation angle of about 0.570 was observed at photon energy hw»2.65 eV for the Mn₅₅Sb₃₆Bi₉ film with an average grain size of 30 nm. The changes of the exchange splitting and the spin-orbit interaction strength are responsible for the strong dependence of Kerr effect in Mn(Sb_1-xBi_x) nanocrystalline films. It was shown that the large MO polar Kerr rotation angle is correlated with a perpendicular magnetic anisotropy in nanocrystalline Co3Pt films

Keywords: optical and magneto-optical properties; Kerr effect; nanocrystalline films.

Paper received 14.03.02; revised manuscript received 23.05.02; accepted for publication 25.06.02.

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