• DocumentCode
    3560374
  • Title

    Effects of MgO Barrier Thickness on Magnetic Anisotropy Energy Constant in Perpendicular Magnetic Tunnel Junctions of (Co/Pd) _{n} /MgO/(Co/Pt) <

  • Author

    Lee, Ching-Ming ; Lee, Jia-Mou ; Ye, Lin-Xiu ; Wang, Sheng-Yuan ; Wang, Yi-Rung ; Wu, Te-Ho

  • Author_Institution
    Taiwan SPIN Res. Center, Nat. Yunlin Univ. of Sci. & Technol., Douliou
  • Volume
    44
  • Issue
    11
  • fYear
    2008
  • Firstpage
    2558
  • Lastpage
    2561
  • Abstract
    In this study, we report experimental results on perpendicular magnetic tunnel junctions composed of the binary multilayer Co/Pt and Co/Pd with various MgO barrier thicknesses. The coercivities of both Co/Pt and Co/Pd layers varied substantially with the MgO thickness. Very interestingly, the perpendicular anisotropy constant Ku of the Co/Pt multilayer measured by the extraordinary Hall effect oscillated with the MgO thickness, and the period of this oscillation was about 0.3 nm. Furthermore, both the Ku value and the oscillation amplitude decreased after annealing at 150deg C and 200deg C, which suggest that the oscillation may result from the film morphology.
  • Keywords
    Hall effect; annealing; cobalt; coercive force; magnesium compounds; magnetic anisotropy; magnetic multilayers; magnetic tunnelling; magnetoelectric effects; palladium; platinum; (Co-Pd)n-MgO-(Co-Pt)n; Hall effect; annealing; binary magnetic multilayers; coercivity; film morphology; oscillation; perpendicular magnetic anisotropy; perpendicular magnetic tunnel junctions; temperature 150 C; temperature 200 C; Extraordinary Hall effect (EHE); perpendicular anisotropy constant; perpendicular magnetic tunnel junctions (pMTJs);
  • fLanguage
    English
  • Journal_Title
    Magnetics, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9464
  • Type

    jour

  • DOI
    10.1109/TMAG.2008.2002594
  • Filename
    4717738
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=3560374