Ion beam modification of exchange coupling to fabricate patterned media

Mojtaba Ranjbar, S. N. Piramanayagam, R. Sbiaa, K. O. Aung, Z. B. Guo, T. C. Chong

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

For bit-patterned media, media with low remanent magnetization (M r) and high M r regions are needed for storing information, which is usually achieved by lithographically defining magnetic and non-magnetic regions. In this work, we have investigated the use of ion beam modification of media surface to define the low and high M r states using a medium that is at a low M r state to start with. The low M r state is achieved by the use of synthetic antiferromagnetic coupling obtained in Co-alloy/Ru/Co-alloy trilayer structured film. Local ion beam modification at 30 keV energy using Ga ions was used to create high M r regions. AFM and MFM observations indicated that patterned regions of low and high M r can be observed with ion beam irradiation. This technique is a potential method to achieve patterned media without the need of planarization techniques.

Original languageEnglish
Pages (from-to)2611-2614
Number of pages4
JournalJournal of Nanoscience and Nanotechnology
Volume11
Issue number3
DOIs
Publication statusPublished - Mar 2011

Fingerprint

Exchange coupling
Ion beams
ion beams
Ions
Magnetization
Irradiation
magnetic force microscopy
atomic force microscopy
magnetization
irradiation
ions

Keywords

  • Antiferromagnetically coupled media
  • Focused ion beam
  • Magnetic materials
  • Nanofabrication
  • Patterning

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)
  • Bioengineering
  • Biomedical Engineering

Cite this

Ion beam modification of exchange coupling to fabricate patterned media. / Ranjbar, Mojtaba; Piramanayagam, S. N.; Sbiaa, R.; Aung, K. O.; Guo, Z. B.; Chong, T. C.

In: Journal of Nanoscience and Nanotechnology, Vol. 11, No. 3, 03.2011, p. 2611-2614.

Research output: Contribution to journalArticle

Ranjbar, Mojtaba ; Piramanayagam, S. N. ; Sbiaa, R. ; Aung, K. O. ; Guo, Z. B. ; Chong, T. C. / Ion beam modification of exchange coupling to fabricate patterned media. In: Journal of Nanoscience and Nanotechnology. 2011 ; Vol. 11, No. 3. pp. 2611-2614.
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