Perpendicular Magnetic Anisotropy in FePt Patterned Media Employing a CrV Seed Layer

Hyunsu Kim, Jin Seo Noh, Jong Wook Roh, Dong Won Chun, Sungman Kim, Sang Hyun Jung, Ho Kwan Kang, Won Yong Jeong, Wooyoung Lee

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

A thin FePt film was deposited onto a CrV seed layer at 400°C and showed a high coercivity (~3,400 Oe) and high magnetization (900-1,000 emu/cm3) characteristic of L10 phase. However, the magnetic properties of patterned media fabricated from the film stack were degraded due to the Ar-ion bombardment. We employed a deposition-last process, in which FePt film deposited at room temperature underwent lift-off and post-annealing processes, to avoid the exposure of FePt to Ar plasma. A patterned medium with 100-nm nano-columns showed an out-of-plane coercivity fivefold larger than its in-plane counterpart and a remanent magnetization comparable to saturation magnetization in the out-of-plane direction, indicating a high perpendicular anisotropy. These results demonstrate the high perpendicular anisotropy in FePt patterned media using a Cr-based compound seed layer for the first time and suggest that ultra-high-density magnetic recording media can be achieved using this optimized top-down approach.

Original languageEnglish
Article number13
Pages (from-to)1-6
Number of pages6
JournalNanoscale Research Letters
Volume6
Issue number1
DOIs
Publication statusPublished - 2011 Jan

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

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    Kim, H., Noh, J. S., Roh, J. W., Chun, D. W., Kim, S., Jung, S. H., Kang, H. K., Jeong, W. Y., & Lee, W. (2011). Perpendicular Magnetic Anisotropy in FePt Patterned Media Employing a CrV Seed Layer. Nanoscale Research Letters, 6(1), 1-6. [13]. https://doi.org/10.1007/s11671-010-9755-2