Microstructure and magnetic behavior of electrodeposited CoPt thick films upon annealing

P. L. Wu, X. H. Li, W. Li, Hongyu Sun, Y. Chen, X. Y. Zhang

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

CoPt films with a thickness about 5-mu m consisting of a disordered face-centered cubic phase have been prepared by using the electrodeposition technique. X-ray diffraction measurements and transmission electron microscopy studies reveal that the annealed CoPt films possess a nanocomposite microstructure of A1 + L1CoPt and the size and volume fraction of the L10 ordered phase increase with annealing time. A strong magnetic exchange coupling between the A1 phase and the L10 ordered phase is observed after annealing for 2.5 h, which yields a large coercivity Hc=14.2 kOe and a high remanence ratio Mr/Ms = 0.88 for the nanocomp(c) 2007 Elsevier B.V. All rights reserved.
Original languageEnglish
JournalMaterials Letters
Volume62
Issue number2
Pages (from-to)309-312
Number of pages4
ISSN0167-577X
DOIs
Publication statusPublished - 2008
Externally publishedYes

Keywords

  • Magnetic materials
  • Microstructure
  • Thick films

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