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Published on: July 2, 2018
Planar patterned magnetic media obtained by ion irradiation
1C. Chappert, V. Kottler, T. Devolder, V. Mathet, Institut d'Electronique Fondamentale, Unite de Recherche Associee CNRS 022, Universite Paris Sud, 91405 Orsay Cedex, France. H. Bernas, Centre de Spectrometrie Nucleaire et de Spectromet.
Science (New York, N.Y.)
|June 25, 1998
Summary
Ion irradiation patterned magnetic properties of cobalt-platinum materials without altering surface characteristics. This technique allows precise control over magnetic anisotropy and coercive force for advanced data storage.
Area of Science:
- Materials Science
- Nanotechnology
- Magnetism
Background:
- Patterning magnetic materials is crucial for developing advanced data storage technologies.
- Controlling magnetic properties at the nanoscale presents significant challenges.
- Cobalt-platinum (Co/Pt) multilayers are promising candidates for high-density magnetic recording due to their tunable magnetic properties.
Purpose of the Study:
- To investigate the feasibility of using ion irradiation through a resist mask to pattern the magnetic properties of Co/Pt multilayers.
- To assess the impact of ion irradiation on the magnetic, optical, and surface properties of Co/Pt materials.
- To demonstrate the potential of this technique for ultrahigh-density magnetic recording.
Main Methods:
- Fabrication of Co/Pt simple sandwiches and multilayers.
- Application of lithographically defined resist masks.
- Ion irradiation of patterned Co/Pt materials.
- Characterization using near- and far-field magneto-optical microscopy.
- Analysis of magnetic properties (coercive force, magnetic anisotropy) and surface properties (roughness, optical).
Main Results:
- Successful patterning of magnetic properties in Co/Pt multilayers via ion irradiation.
- No significant changes observed in surface roughness or optical properties post-irradiation.
- Demonstrated precise control over coercive force and magnetic anisotropy by adjusting ion irradiation fluence.
- Visualized patterned magnetic domains using magneto-optical microscopy on 1-micrometer lines.
Conclusions:
- Ion irradiation through a resist mask is an effective method for patterning magnetic properties of Co/Pt materials.
- The technique preserves crucial surface and optical characteristics, making it suitable for integration into existing fabrication processes.
- This approach offers a viable pathway towards achieving ultrahigh-density magnetic recording by enabling nanoscale magnetic patterning.
