Mechanism of coercivity enhancement by Ag addition in FePt-C granular films for heat assisted magnetic recording media

B. S.D.Ch S. Varaprasad, Y. K. Takahashi*, J. Wang, T. Ina, T. Nakamura, W. Ueno, K. Nitta, T. Uruga, K. Hono

*この研究の対応する著者

研究成果: Article査読

29 被引用数 (Scopus)

抄録

We investigated the Ag distribution in a FePtAg-C granular film that is under consideration for a heat assisted magnetic recording medium by aberration-corrected scanning transmission electron microscope-energy dispersive X-ray spectroscopy and X-ray absorption fine structure. Ag is rejected from the core of FePt grains during the deposition, forming Ag-enriched shell surrounding L10-ordered FePt grains. Since Ag has no solubility in both Fe and Pt, the rejection of Ag induces atomic diffusions thereby enhancing the kinetics of the L10-order in the FePt grains.

本文言語English
論文番号222403
ジャーナルApplied Physics Letters
104
22
DOI
出版ステータスPublished - 2014 6 2
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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