emiconductor Physics, Quantum Electronics & Optoelectronics, 5 (2), P. 217-221 (2002)

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(Sb1-xBix) 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(Sb1-xBix) 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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