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/cm 3) characteristic of L1 0 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
Pages (from-to)1-6
Number of pages6
JournalNanoscale Research Letters
Volume6
Issue number1
DOIs
Publication statusPublished - 2011 Jan 1

Fingerprint

Magnetic anisotropy
Coercive force
Seed
seeds
Magnetization
Anisotropy
magnetization
anisotropy
coercivity
Magnetic recording
Saturation magnetization
Ion bombardment
Magnetic properties
magnetic recording
Annealing
Plasmas
Thin films
bombardment
magnetic properties
saturation

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Kim, Hyunsu ; Noh, Jin Seo ; Roh, Jong Wook ; Chun, Dong Won ; Kim, Sungman ; Jung, Sang Hyun ; Kang, Ho Kwan ; Jeong, Won Yong ; Lee, Wooyoung. / Perpendicular Magnetic Anisotropy in FePt Patterned Media Employing a CrV Seed Layer. In: Nanoscale Research Letters. 2011 ; Vol. 6, No. 1. pp. 1-6.
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Kim, H, Noh, JS, Roh, JW, Chun, DW, Kim, S, Jung, SH, Kang, HK, Jeong, WY & Lee, W 2011, 'Perpendicular Magnetic Anisotropy in FePt Patterned Media Employing a CrV Seed Layer', Nanoscale Research Letters, vol. 6, no. 1, pp. 1-6. https://doi.org/10.1007/s11671-010-9755-2

Perpendicular Magnetic Anisotropy in FePt Patterned Media Employing a CrV Seed Layer. / Kim, Hyunsu; Noh, Jin Seo; Roh, Jong Wook; Chun, Dong Won; Kim, Sungman; Jung, Sang Hyun; Kang, Ho Kwan; Jeong, Won Yong; Lee, Wooyoung.

In: Nanoscale Research Letters, Vol. 6, No. 1, 01.01.2011, p. 1-6.

Research output: Contribution to journalArticle

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