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L1₀ FePtCu bit patterned media.

C Brombacher1, M Grobis, J Lee

  • 1Institute of Physics, Chemnitz University of Technology, D-09107 Chemnitz, Germany.

Nanotechnology
|December 15, 2011
PubMed
Summary
This summary is machine-generated.

Chemically ordered iron-platinum-copper (FePtCu) magnetic films were patterned into nanoscale dots for enhanced data storage. Shingled writing demonstrated successful recording on a single track using these patterned magnetic dots.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Magnetism

Background:

  • Perpendicular magnetic anisotropy (PMA) is crucial for high-density magnetic storage.
  • Nanoscale patterning of magnetic films enhances their storage capabilities.
  • Iron-platinum (FePt) based alloys are promising for high-performance magnetic storage media.

Purpose of the Study:

  • To investigate the magnetic properties of patterned L1₀ FePtCu thin films.
  • To demonstrate the feasibility of high-density data recording on these patterned films.
  • To evaluate the performance of nanoimprint lithography for creating magnetic dot arrays.

Main Methods:

  • Fabrication of 5 nm-thick L1₀ FePtCu films with strong PMA.
  • Post-patterning using nanoimprint lithography to create a dot array (30 nm diameter, 60 nm pitch).
  • Characterization of dot magnetic properties and demonstration of single-track recording using shingled writing with a hard disk drive head.

Main Results:

  • The patterned FePtCu dots exhibited single-domain behavior.
  • An enhanced switching field was observed in the dots compared to the continuous film.
  • Successful data recording was achieved on a single track using shingled writing.

Conclusions:

  • Nanoimprint lithography is effective for patterning FePtCu films into high-density arrays.
  • Patterned FePtCu dots with PMA show potential for advanced magnetic recording media.
  • Shingled writing is a viable technique for data storage on these nanoscale magnetic dot arrays.