Magnetic properties of patterned cgc perpendicular films with soft magnetic fillings

M. Aniya, A. Mitra, A. Shimada, Y. Sonobe, T. Ouchi, Simon J. Greaves, Takayuki Homma

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

To increase the areal density of hard disk drives (HDDs), discrete track media (DTM) and bit-patterned media (BPM) are being extensively studied. In the DTM and BPM, it is essential to isolate data tracks or bits. Unlike isolating the data tracks or bits using the conventional procedure involving physical etching, we attempted to isolate the tracks or bits with a soft guard band using an area-selective ion irradiation method. We prepared hard and soft (H/S) patterned films by nanoimprinting followed by ion irradiation. We confirmed the magnetic isolation of tracks and bits using magnetic force microscopy (MFM) images and magnetooptical Kerr effect (MOKE) signals. The results of an analysis of the magnetic properties of patterned coupled granular continuous (CGC) films with weak exchange coupling confirmed the validity of this novel approach for the fabrication of DTM and BPM.

Original languageEnglish
Article number5257057
Pages (from-to)3539-3542
Number of pages4
JournalIEEE Transactions on Magnetics
Volume45
Issue number10
DOIs
Publication statusPublished - 2009 Oct
Externally publishedYes

Fingerprint

Magnetic properties
Ion bombardment
Kerr magnetooptical effect
Magnetic force microscopy
Exchange coupling
Hard disk storage
Etching
Fabrication

Keywords

  • Discrete-track media
  • Exchange coupling
  • Index Terms-Coupled granular continuous (CGC) films
  • Ion irradiation
  • Magnetic modification
  • Patterned media

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

Cite this

Aniya, M., Mitra, A., Shimada, A., Sonobe, Y., Ouchi, T., Greaves, S. J., & Homma, T. (2009). Magnetic properties of patterned cgc perpendicular films with soft magnetic fillings. IEEE Transactions on Magnetics, 45(10), 3539-3542. [5257057]. https://doi.org/10.1109/TMAG.2009.2023868

Magnetic properties of patterned cgc perpendicular films with soft magnetic fillings. / Aniya, M.; Mitra, A.; Shimada, A.; Sonobe, Y.; Ouchi, T.; Greaves, Simon J.; Homma, Takayuki.

In: IEEE Transactions on Magnetics, Vol. 45, No. 10, 5257057, 10.2009, p. 3539-3542.

Research output: Contribution to journalArticle

Aniya, M, Mitra, A, Shimada, A, Sonobe, Y, Ouchi, T, Greaves, SJ & Homma, T 2009, 'Magnetic properties of patterned cgc perpendicular films with soft magnetic fillings', IEEE Transactions on Magnetics, vol. 45, no. 10, 5257057, pp. 3539-3542. https://doi.org/10.1109/TMAG.2009.2023868
Aniya M, Mitra A, Shimada A, Sonobe Y, Ouchi T, Greaves SJ et al. Magnetic properties of patterned cgc perpendicular films with soft magnetic fillings. IEEE Transactions on Magnetics. 2009 Oct;45(10):3539-3542. 5257057. https://doi.org/10.1109/TMAG.2009.2023868
Aniya, M. ; Mitra, A. ; Shimada, A. ; Sonobe, Y. ; Ouchi, T. ; Greaves, Simon J. ; Homma, Takayuki. / Magnetic properties of patterned cgc perpendicular films with soft magnetic fillings. In: IEEE Transactions on Magnetics. 2009 ; Vol. 45, No. 10. pp. 3539-3542.
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