FePt fct-(001) texture prepared at lower temperature for high areal density perpendicular recording media

Yingfan Xu, J. S. Chen, Daoyang Dai, J. P. Wang

Research output: Contribution to journalConference articlepeer-review

8 Scopus citations

Abstract

FePt thin films with face-centered-tetragonal (fct)-(001) texture has been prepared by magnetron sputtering at elevated temperatures from 350 °C to 450 °C. Cr100-x Rux underlayer was used to induce the FePtfct-(001) texture. The dependence of the texture on Ru content and substrate temperature is investigated. Cr lattice constant was expanded by addition of Ru, resulting in a bigger lattice mismatch between the Cr(200)-FePt(001) planes. Greater fct phase with c axis oriented perpendicular to the film plane has been achieved in films with Cr91 Ru9 underlayer. This result may arise from the strain-enhanced preferred orientation. The increase of substrate temperature favors the formation of fct-(001) texture. However, higher substrate temperature results in less fct phase formation. This may be caused by the diffusion of Cr from underlayer into magnetic layer.

Original languageEnglish (US)
Pages (from-to)2042-2044
Number of pages3
JournalIEEE Transactions on Magnetics
Volume38
Issue number5 I
DOIs
StatePublished - Sep 1 2002
Event2002 International Magnetics Conference (Intermag 2002) - Amsterdam, Netherlands
Duration: Apr 28 2002May 2 2002

Keywords

  • FePt
  • High anisotropy
  • Perpendicular recording
  • fct-(001) texture

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