Skip to main content
SpringerLink
Log in

Structure and Magnetic Properties of Graded (001)-Oriented FePt Films Prepared by Magnetron Sputtering and Rapid Thermal Annealing

  • Original Paper
  • Published:
Journal of Superconductivity and Novel Magnetism Aims and scope Submit manuscript

Abstract

L10-FePt/[Fe/Pt]27 multilayer films were prepared on (100)-oriented single-crystal MgO substrates. Structural analysis indicates epitaxial growth of the L10-FePt films during high-temperature deposition. The room-temperature-deposited [Fe/Pt]27 multilayer exhibits the fcc-FePt structure grown epitaxially on the L10-FePt base layer. The degree of chemical order and thereby the anisotropy of the top layer has been controlled by varying the temperature of a post-deposition annealing process. Compared with the as-deposited films, coercivities of the films annealed below 400 ∘C are substantially decreased by introducing the formation of a graded anisotropy in the partially ordered top layer. Coercivities decrease for annealing temperatures that are greater than 400 ∘C due to improved ordering of the top layer.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3

Similar content being viewed by others

References

  1. Guo, H.H., Chu, H.G., Ma, B., Zhang, Z.Z., Jin, Q.Y., Wang, H., Wang, J.P.: Influence of Ag on the microstructure and magnetic properties of perpendicular exchange coupled composite L10-[FePt-Ag]/[Co/Ni] N films. Appl. Phys. Lett. 102, 252410 (2013)

    Article  ADS  Google Scholar 

  2. Lu, Z., Guo, J., Gan, Z., Liu, Y., Xiong, R., Mankey, G.J., Butler, W.H.: Reducing the writing field of L10-FePt by graded order parameter. J. Appl. Phys. 113, 073912 (2013)

    Article  ADS  Google Scholar 

  3. Piramanayagam, S.N., Srinivasan, K.: Recording media research for future hard disk drives. J. Magn. Magn. Mater. 321, 485494 (2009)

    Article  Google Scholar 

  4. Weller, D., McDaniel, T.: Media for extremely high density recording. In: Sellmyer, D., Skomski, R. (eds.) Advanced Magnetic Nanostructures, p 295. Springer, Berlin (2006)

  5. Goll, D., Breitling, A., Gu, L., Aken, P.A. van, Sigle, W.: Experimental realization of graded composite media with perpendicular magnetization. J. Appl. Phys. 104, 083903 (2008)

    Article  ADS  Google Scholar 

  6. Suess, D., Schrefl, T., Dittrich, R., Kirschner, M., Dorfbauer, F., Hrkac, G., Fidler, J.: Exchange spring recording media for areal densities up to 10Tbit/in2. J. Magn. Magn. Mater. 290–291, 551–554 (2005)

    Article  ADS  Google Scholar 

  7. Chen, J.S., Huang, L.S., Hu, J.F., Ju, G., Chow, G.M.: FePt-C graded media for ultra-high density magnetic recording. J. Phys. D: Appl. Phys. 43, 185001 (2010)

    Article  ADS  Google Scholar 

  8. Zhou, T.-J., Lim, B.C., Liu, B.: Anisotropy graded nanocomposite thin films with small grain size. Appl. Phys. Lett. 94, 152505 (2009)

    Article  ADS  Google Scholar 

  9. Casoli, F., Albertini, F., Nasi, L., Fabbrici, S., Cabassi, R., Bolzoni, F., Bocchi, C.: Strong coercivity reduction in perpendicular bilayers due to FePt/Fe hard/soft coupling. Appl. Phys. Lett. 92, 142506 (2008)

    Article  ADS  Google Scholar 

  10. Makarov, D., Lee, J., Brombacher, C., Schubert, C., Fuger, M., Suess, D., Fidler, J., Albrecht, M.: Perpendicular FePt-based exchange-coupled composite media. Appl. Phys. Lett. 96, 062501 (2010)

    Article  ADS  Google Scholar 

  11. Lee, J., Alexandrakis, V., Fuger, M., Dymerska, B., Suess, D., Niarchos, D., Fidler, J.: FePt graded media with a rough interphase boundary. Appl. Phys. Lett. 98, 222501 (2011)

    Article  ADS  Google Scholar 

  12. Pandey, K.K.M., Chen, J.S., Chow, G.M., Hu, J.F.: L10-CoPt-Ta2O5 exchange coupled multilayer media for magnetic recording. Appl. Phys. Lett. 94, 232502 (2009)

    Article  ADS  Google Scholar 

  13. Chiang, C.-C., Tsai, W.-C., Wang, L.-W., Hou, H.-C., Liao, J.-W., Lin, H.-J., Chang, F.-H., Kirby, B. J., Lai, C.-H.: (001) FePt graded media with PtMn underlayers. Appl. Phys. Lett. 99, 212504 (2011)

    Article  ADS  Google Scholar 

  14. Alexandrakis, V., Niarchos, D., Mergia, K., Lee, J., Fidler, J., Panagiotopoulos, I.: Magnetic properties of graded films obtained by heat treatment of FePt/CoPt multilayers. J. Appl. Phys. 107, 013903 (2010)

    Article  ADS  Google Scholar 

  15. Wang, F., Xu, X., Liang, Y., Zhang, J., Wu, H.: FeAu/FePt exchange-spring media fabricated by magnetron sputtering and postannealing. Appl. Phys. Lett. 95, 022516 (2009)

    Article  ADS  Google Scholar 

Download references

Funding

This work is financially supported by the National Natural Science Foundation of China under Grant No. 51571072.

Author information

Authors and Affiliations

  1. Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun, 130103, China

    Weiwei Yang, Yongsheng Yu, Ming Feng, Ji Li & Haibo Li

  2. MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, China

    Weiwei Yang & Yongsheng Yu

Authors
  1. Weiwei Yang
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Yongsheng Yu
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Ming Feng
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Ji Li
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Haibo Li
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Yongsheng Yu.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Yang, W., Yu, Y., Feng, M. et al. Structure and Magnetic Properties of Graded (001)-Oriented FePt Films Prepared by Magnetron Sputtering and Rapid Thermal Annealing. J Supercond Nov Magn 31, 3251–3254 (2018). https://doi.org/10.1007/s10948-018-4595-x

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10948-018-4595-x

Keywords

Search

Navigation