Enhancement of magneto-optical polar Kerr effect in ultraviolet photon energies in TbFeCo/(Pt, Pd) multilayers

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  • Itoh Y.
    Information Storage Materials Laboratory, Toyota Technological Institute
  • Phillips G.N.
    Information Storage Materials Laboratory, Toyota Technological Institute
  • Suzuki T.
    Information Storage Materials Laboratory, Toyota Technological Institute

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Other Title
  • TbFeCo/(Pt, Pd)多層膜の紫外領域における極磁気Kerr効果のエンハンスメント機構について
  • TbFeCo Pt Pd タソウ マク ノ シガイ リョウイキ ニ オケル ゴク ジキ Kerr コウカ ノ エンハンスメント キコウ ニ ツイテ

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Abstract

The magnetic and magneto-optical properties of TbFeCo/(Pt, Pd) multilayer films prepared by sputterdeposition have been studied. The absolute magnitude for the polar Kerr rotation angle of TbFeCo/Pt multilayers increases at ultraviolet photon energies. On the other hand, little contribution from Pd is found in the spectra of TbFeCo/Pd multilayers. The peak of ωσ_<xy>" at about 5 eV in TbFeCo/Pt multilayers reflects the behavior of FePt alloys and shows a much higher value than that of TbFeCo/Pd multilayers. This result implies that the difference of ωσ_<xy>" spectra between both multilayers reflects the difference in transitions between Pt 5d and Pd 4d states. A drastic increase in the magnetic moment and ωσ_<xy>" spectra suggest the existence of interfacial Fe-Pt and Fe-Pd alloys, and this possibility is supported by a simulation of the Kerr spectra for a proposed model of interfacial regions.

Journal

  • ITE Technical Report

    ITE Technical Report 23.20 (0), 49-55, 1999

    The Institute of Image Information and Television Engineers

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