Nanostructure and magnetic properties of L10 FePt:X films

Tom A. George, Zhen Li, Minglang Yan, Yingfan Xu, Ralph Skomski, David J Sellmyer

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Nonepitaxial FePt:X films (X=Cu,Au,CuAu) with tunable magnetic properties are fabricated and investigated. Emphasis is on controlling and adjusting the magnetic properties of high-density perpendicular recording media through exchange decoupling and anisotropy. The films are initially deposited as multilayers with the structure [FePtX]n and have individual thicknesses from about 0.06 to 1.1 nm. To create an (001)-oriented granular L 10 structure, the films are then annealed at temperatures of 600 °C for 5 min and 550 °C for 10 min. The data indicate that Cu enters the L 10 lattice whereas Au segregates at the grain boundaries and reduces the intergranular exchange coupling. For X=CuAu, we obtain coercivities Hc below 10 kOe, and slopes α= (dMdH) Hc of about 1. For X=Cu, we find a favorable reduction in Curie temperature and Hc.

Original languageEnglish (US)
Article number07D502
JournalJournal of Applied Physics
Volume103
Issue number7
DOIs
StatePublished - Apr 21 2008

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magnetic properties
decoupling
coercivity
Curie temperature
grain boundaries
adjusting
recording
slopes
anisotropy
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Nanostructure and magnetic properties of L10 FePt:X films. / George, Tom A.; Li, Zhen; Yan, Minglang; Xu, Yingfan; Skomski, Ralph; Sellmyer, David J.

In: Journal of Applied Physics, Vol. 103, No. 7, 07D502, 21.04.2008.

Research output: Contribution to journalArticle

George, Tom A. ; Li, Zhen ; Yan, Minglang ; Xu, Yingfan ; Skomski, Ralph ; Sellmyer, David J. / Nanostructure and magnetic properties of L10 FePt:X films. In: Journal of Applied Physics. 2008 ; Vol. 103, No. 7.
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