Interface and Volume Anisotropy of Mbe-Grown Co/Pt (111), (110) and (001) and Sputtered Co/Pt Multilayers

Abstract

A quantitative determination of interface (Ks) and volume anisotropy (Keff) constants of MBE and sputtered Co/Pt multilayers is reported. Torque and VSM magnetometry were used to determine the total average anisotropy and the room temperature magnetization of four different series of films with varying Co thickness and nearly constant Pt thickness. All films were characterized with X-ray diffraction and X-ray fluorescence, allowing the determination of the “magnetic” volume with good accuracy. Both Ks and Keff are found to be orientation dependent. We find the following results for MBE films grown on Ag buffered GaAs substrates and highly < 111 > textured films, grown on etched SiNx buffers

The [110]-oriented MBE films show in addition a large (intrinsic) in-plane anisotropy constant \({\text{K}}_\parallel ^0 \simeq - 3{\text{MJ/}}{{\text{m}}^{\text{3}}}\), which is found to be independent of the Co thickness. [100] is the easy and \([1\bar{1}0]\) the hard in-plane direction.

This is a preview of subscription content, access via your institution.

References

  1. [1]

    CH. Lee, R.F.C. Farrow, C.J. Lin, E.E. Marinero, C.J. Chien, Phys. Rev. B, 42, 1990, 11384.

    CAS  Article  Google Scholar 

  2. [2]

    CH. Lee, R.F.C. Farrow, B.D. Hermsmeier, R.F. Marks, and W.R. Bennet, C.J. Lin, E.E. Marinero, P.D. Kirchner, C.J. Chien, J. Magn. Magn. Mater., 93, 1991, 592.

    CAS  Article  Google Scholar 

  3. [3]

    F.J.A. den Broeder, D. Kuiper, H.C Donkersloot, W. Hoving, Comparison of the magnetic anisotropy of (001) and (111) oriented Co/Pd multilayers, Appl. Phys. A, 49, 1989, 507–512.

    Article  Google Scholar 

  4. [4]

    B.N. Engel, CD. England, R.A. vanLeeuwen, M.H. Wiedmann, and CM. Falco, Phsy. Rev. Lett., 67, 1991, 1910.

    CAS  Article  Google Scholar 

  5. [5]

    M.T. Johnson, J.J. de Vries, N.W.E. McGee, J. aan de Stegge, and F.J.A. den Broeder, Orientational Dependence of the Interface Magnetic Anisotropy in Epitaxial Ni/Co/Ni Sandwiches, Phys. Rev. Lett., 69, 1992, 3575.

    CAS  Article  Google Scholar 

  6. [6]

    B.D. Hermsmeier, R.F.C. Farrow, C.H. Lee, R.F. Marks, and E.E. Marinero, C.J. Lin, R.F. Marks, C.J. Chien, J. Appl. Phys., 69, 1991, 5646.

    CAS  Article  Google Scholar 

  7. [7]

    R.F.C. Farrow, B.D. Hermsmeier, CH. Lee, R.F. Marks and E.E. Marinero, C.J. Lin, C.J. Chien, S.B. Hagstrom, Mat. Res. Symp. Proc, 229, 1991, 115.

    Article  Google Scholar 

  8. [8]

    X. Yan, T. Egami, E.E. Marinero, R.F.C. Farrow, CH. Lee, J. Mat. Res., 7, 1992, 1309.

    CAS  Article  Google Scholar 

  9. [9]

    C.J. Chien, B.M. Clemens, S.B. Hagstrom, R.F.C. Farrow and CH. Lee, E.E. Marinero, C.J. Lin, Mat. Res. Soc. Proc., 231, 1991, 465.

    Article  Google Scholar 

  10. [10]

    N.-H. Cho, Kannan M. Krishnan, CA. Lucas, R.F.C. Farrow, Microstructure and magnetic anisotropy of ultrathin Co/Pt multilayers grown on GaAs(111) by molecular-beam epitaxy, J. Appl. Phys., 72, 1992, 5799–5807.

    CAS  Article  Google Scholar 

  11. [11]

    M. Toney, unpublished data, 1992.

    Google Scholar 

  12. [12]

    M.F. Toney, R.F.C. Farrow, R.F. Marks, G. Harp, T.A. Rabedeau, Mat. Res. Soc. Symp. Proc, 263, 1992, 237.

    CAS  Article  Google Scholar 

  13. [13]

    R.H. Victora and J.M. MacLaren, Theory of anisotropy in strained superlattices, J. Appl. Phys., 73, 1993, 6415.

    CAS  Article  Google Scholar 

  14. [14]

    L. Néel, J. Phys. Radium, 15, 1954, 376.

    Article  Google Scholar 

  15. [15]

    G.H.O. Daalderop, P.J. Kelly, M.F.H. Schuurmans, First-principles calculations of the magnetic anisotropy energy of (Co), Phys. Rev. B, 42, 1990, 7270–7273.

    CAS  Article  Google Scholar 

  16. [16]

    N. W. E. McGee, M.T. Johnson, J.J. de Vries, J. aan de Stegge, Localised Kerr study of the Magnetic Properties of an Ultrathin Epitaxial Co Wedge grown on Pt(111), J. Appl. Phys., 73, 1993, 3418.

    CAS  Article  Google Scholar 

  17. [17]

    T. Suzuki, H.Notarys, D. Dobbertin, C.-J. Lin, D. Weiler and D. Miller and G. Gorman, Microstructure and magnetic properties in Co/Pt multilayer films, IEEE Trans. Mag., 28, 1992, 2754.

    CAS  Article  Google Scholar 

  18. [18]

    D. Weiler, H. Notarys, T. Suzuki, G. Gorman, T. Logan, and I. McFadyen, C.J. Chien, Thickness Dependent Coercivity in Sputtered Co/Pt Multilayers, IEEE Trans. Mag., 28, 1992, 2500–2502.

    Article  Google Scholar 

  19. [19]

    H. Miyajima, K. Sato, T. Mizoguchi, Simple analysis of torque measurement of magnetic thin films, J. Appl. Phys., 47, 1976, 4669.

    CAS  Article  Google Scholar 

  20. [20]

    R.F.C. Farrow, CH. Lee, R.F. Marks, G. Harp, M. Toney and T.A. Rabedeau, D. Weiler, H. Brandie, in “Magnetism and Structure in Systems of Reduced Dimensions”, NATO ASI series, eds. R.F.C. Farrow et al., Plenum Publishing Corp., New York, 1993.

  21. [21]

    T.A. Rabedeau, G.R. Harp, R.F. Marks, R.F.C. Farrow, M.F. Toney, (unpublished), 1993.

  22. [22]

    C.-J. Lin, H.V. Do, Magneto-optical recording on evaporated Co/Pt multilayer films, IEEE Trans. Magn., 26, 1990, 1700–1702.

    CAS  Article  Google Scholar 

  23. [23]

    K. LeDang, P. Veillet, C. Chappert, R.F.C. Farrow, R.F. Marks and D. Weller, Orthorombic distortion of Co lattice in a (110) Co/Pt multilayer grown on (001) GaAs substrate, Phys. Rev. B (submitted), 1993.

    Google Scholar 

  24. [24]

    B. Hillebrands and J.R. Dutcher, Origin of very large in-plane anisotropics in (HO)-oriented Co/Pd and Co/Pt coherent superlattices, Phys. Rev. B / Brief Reports, 47, 1993, 6126.

    CAS  Google Scholar 

  25. [25]

    B. Hillebrands, J.V. Harzer, G. Güntherodt, J.R. Dutcher, Study of Co-based multilayers by Brillouin light scattering, J. Magn. Soc. Jpn., 17 Supp. SI, 1993, 17–22.

    Google Scholar 

  26. [26]

    H. Ebert, S. Ruegg, G. Schütz, R. Wienke, W.B. Zeper, Magnetic properties of Co/Pt multilayers, J. Magn. Magn. Mater., 93, 1991, 601–604.

    CAS  Article  Google Scholar 

  27. [27]

    H. Ebert, G. Schütz, R. Wienke, S. Ruegg, W. Wilhelm and W.B. Zeper, J. Magn. Magn. Mater., 93, 1991, 601.

    CAS  Article  Google Scholar 

  28. [28]

    T.R. McGuire, J.A. Aboaf, E. Klokholm, Magnetic and transport properties of Co-Pt thin films, J. Appl. Phys., 55, 1984, 1951.

    CAS  Article  Google Scholar 

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to D. Weller.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Weller, D., Farrow, R., Marks, R. et al. Interface and Volume Anisotropy of Mbe-Grown Co/Pt (111), (110) and (001) and Sputtered Co/Pt Multilayers. MRS Online Proceedings Library 313, 791–797 (1993). https://doi.org/10.1557/PROC-313-791

Download citation