• Title/Summary/Keyword: atomic physics

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The Change of Magnetic Easy Axis in Ion Beam Mixed Co/Pt Multilayer

  • Kim, S.H.;Chang, G.S.;Son, J.H.;Kim, T.Y.;Chae, K.H.;Kang, S.J.;Lee, J.;Jeong, K.;Lee, Y.P.;Whang, C.N.
    • Proceedings of the Korean Vacuum Society Conference
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    • 2000.02a
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    • pp.162-162
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    • 2000

  • We have studied magnetic properties of Co/Pt multilayered films which have attracted great interest as high-density magneto-optical (MO) recording media due to their good MO properties. For this study, [Pt(45 )/Co(35 )]$\times$8 films were deposited with a Pt buffer layer of 60 on Si(100) substrate by alternating electron-beam evaporation in a high vacuum and were ion beam mixed by using 80keV Ar+ at 25$0^{\circ}C$. Especially, an external magnetic field was added to help changing magnetic property during ion beam mixing (IBM). The intermixing of Co and Pt layers after IBM was confirmed with Rutherford Backscattering Spectroscopy (RBS) and Transmission Electron Microscopy (TEM). The MO property of the film was measured with magneto-optical Kerr spectrometer and the change of magnetic easy axis in the film plane was observed from Ker loop data. This anomalous result might be correlated with the change of atomic structure due to the intermixing effect.

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Ab initio MRCI+Q Investigations of Spectroscopic Properties of Several Low-lying Electronic States of S2+ Cation

  • Li, Rui;Zhai, Zhen;Zhang, Xiaomei;Liu, Tao;Jin, Mingxing;Xu, Haifeng;Yan, Bing
    • Bulletin of the Korean Chemical Society
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    • v.35 no.5
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    • pp.1397-1402
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    • 2014

  • The complete active space self-consist field method followed by the internally contracted multireference configuration interaction method has been used to compute the potential energy curves of $X^2\prod_g$, $a^4\prod_u$, $A^2\prod_u$, $b^4\sum_{g}^{-}$, and $B^2\sum_{g}^{-}$ states of $S{_2}^+$ cation with large correlation-consistent basis sets. Utilizing the potential energy curves computed with different basis sets, the spectroscopic parameters of these states were evaluated. Finally, the transition dipole moment and the Franck-Condon factors of the transition from $A^2\prod_u$ to $X^2\prod_g$ were evaluated. The radiative lifetime of $A^2\prod_u$ is calculated to be 887 ns, which is in good agreement with experimental value of $805{\pm}10$ ns.

  • https://doi.org/10.5012/bkcs.2014.35.5.1397 인용 PDF KSCI KPUBS HTML