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An analysis of the mechanism of Kerr effect enhancement in Mn/Dy/Bi

  • Magnetism and Ferroelectricity
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Abstract

A study is reported of the structural, magnetic, and magneto-optic properties of Mn/Dy/Bi films obtained by multilayer technology. The maximum Kerr rotation angle in such films is shown to be θ k =2.25°. Possible reasons for such a large Kerr effect enhancement are considered, namely, an increase in the 6p–3d transition probability caused by symmetry distortion, polarization of the Bi6p band, and a change in the density of states near the Fermi level. The latter reason has been analyzed by simulating the electronic structure of Mn/Dy/Bi through superposition of Dy levels on the MnBi band structure. This approach has revealed possible additional transitions which may be induced by the presence of a Dy buffer and could contribute to the Kerr magneto-optic effect.

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Authors and Affiliations

  1. L. V. Kirenskii Institute of Physics, Siberian Branch of the Russian Academy of Sciences, 660036, Krasnoyarsk, Russia

    S. G. Ovchinnikov, L. V. Burkova, V. A. Seredkin & V. Yu. Yakovchuk

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  1. S. G. Ovchinnikov
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  2. L. V. Burkova
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  3. V. A. Seredkin
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  4. V. Yu. Yakovchuk
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Fiz. Tverd. Tela (St. Petersburg) 41, 91–97 (January 1999)

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Ovchinnikov, S.G., Burkova, L.V., Seredkin, V.A. et al. An analysis of the mechanism of Kerr effect enhancement in Mn/Dy/Bi. Phys. Solid State 41, 80–86 (1999). https://doi.org/10.1134/1.1130733

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  • DOI: https://doi.org/10.1134/1.1130733

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