Hydrogen-induced crystal structural transformation of FePt nanoparticles at low temperature

Masafumi Nakaya, Masayuki Kanehara, Miho Yamauchi, Hiroshi Kitagawa, Toshiharu Teranishi

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

The hydrogen-induced crystal structural transformation of FePt nanoparticles from a chemically disordered face-centered-cubic (fee) structure to a chemically ordered L10 structure was first demonstrated at around 300°C. The hydrogen treatment at low temperature led to not complete but considerable suppression of the nanoparticle coalescence. The obtained L10-FePt nanoparticles exhibited ferromagnetic property with large coercivity at room temperature. The ordering degree of FePt nanoparticles was dependent on both the hydrogen pressure and treatment time.

Original languageEnglish
Pages (from-to)7231-7234
Number of pages4
JournalJournal of Physical Chemistry C
Volume111
Issue number20
DOIs
Publication statusPublished - 2007 May 24

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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