Silicide formation and particle size growth in high temperature annealed, self- assembled

T Thomson, MF Toney, S Raoux, JEE Baglin, Stephen Leslie Lee, S Sun, BD Terris

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

L1(0) FePt nanoparticle assemblies consisting of a few layers of 4-nm-diameter particles, are a potential data storage medium beyond 1 Tbit/in(2). However, annealing at temperatures >500 degreesC is required to form the high anisotropy L1(0) phase. Recent studies have shown a substantial drop in magnetization for T-anneal>650 degreesC. We show that this reduction in magnetization is due to silicide formation as a result of a chemical reaction with the native oxide or Si substrate. We also show that full L1(0) ordering is established only after annealing at 725 degreesC for 60 min and note that particle agglomeration occurs under these conditions. (C) 2004 American Institute of Physics.

Original languageEnglish
Pages (from-to)6738
Number of pages6738
JournalJournal of Applied Physics
Volume95
Issue number11
DOIs
Publication statusPublished - 1 Jun 2004

Keywords

  • X-RAY

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