Ultrasmall iron nanoparticles: Effect of size reduction on anisotropy and magnetization

L. M. Lacroix*, S. Lachaize, Andrea Falqui, T. Blon, J. Carrey, M. Respaud, F. Dumestre, C. Amiens, O. Margeat, B. Chaudret, P. Lecante, E. Snoeck

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

Stable iron nanoparticles have been synthesised by the decomposition of {Fe (N [Si (C H3)3] 2)2 }2 under dihydrogen pressure. Those conditions lead to a system of monodisperse and metallic nanoparticles which diameter is less than 2 nm and stabilized by HN [Si (C H3)3] 2. The magnetization is found to be MS =1.92 μB at., i.e., 10% lower than the bulk value. The Mössbauer spectrum is fitted by two contributions of metallic iron. The magnetic anisotropy energy constant increases up to 5.2× 105 J m3, i.e., ten times the bulk one.

Original languageEnglish (US)
Article number07D521
JournalJournal of Applied Physics
Volume103
Issue number7
DOIs
StatePublished - Apr 21 2008

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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