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Journal of Superconductivity and Novel Magnetism

, Volume 31, Issue 10, pp 3251–3254 | Cite as

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

  • Weiwei Yang
  • Yongsheng Yu
  • Ming Feng
  • Ji Li
  • Haibo Li
Original Paper
  • 139 Downloads

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.

Keywords

FePt Thin film Coercivity Texture 

Notes

Funding Information

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

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Weiwei Yang
    • 1
    • 2
  • Yongsheng Yu
    • 1
    • 2
  • Ming Feng
    • 1
  • Ji Li
    • 1
  • Haibo Li
    • 1
  1. 1.Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of EducationJilin Normal UniversityChangchunChina
  2. 2.MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbinChina

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