FePt nanodot arrays with perpendicular easy axis, large coercivity, and extremely high density

Chaehyun Kim, Thomas Loedding, Seongjin Jang, Hao Zeng, Zhen Li, Yucheng Sui, David J. Sellmyer

Research output: Contribution to journalArticle

70 Scopus citations

Abstract

Ordered FePt nanodot arrays with extremely high density have been developed by physical vapor deposition using porous alumina templates as evaporation masks. Nanodot diameter of 18 nm and periodicity of 25 nm have been achieved, resulting in an areal density exceeding 1× 1012 dots in.2. Rapid thermal annealing converts the disordered fcc to L 10 phase, resulting in (001)-oriented FePt nanodot arrays with perpendicular anisotropy and large coercivity, without the need of epitaxy. High anisotropy and coercivity, perpendicular easy axis orientation and extremely high density are desirable features for future magnetic data storage media applications.

Original languageEnglish (US)
Article number172508
JournalApplied Physics Letters
Volume91
Issue number17
DOIs
StatePublished - 2007

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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