Influence of hydrogen on the growth of FePt thin films

R. Maaß, M. Weisheit, S. Fähler, L. Schultz

Research output: Contribution to journalArticlepeer-review

Abstract

FePt films have been prepared by pulsed laser deposition on MgO(100) in a forming gas atmosphere of 5% hydrogen in argon. At a pressure and temperature combination of 0.1 mbar and 800 °C, smooth continuous and well ordered L 10 phase films can be obtained. The anisotropy field is close to the bulk value, while the coercivity is comparatively low at 0.15 T. This is in contrast to films deposited in vacuum, which are granular in nature and show huge coercivity. It is proposed that nucleation centers for island growth introduced by hydrogen on the MgO surface are responsible for this difference in growth mode. The temperature and pressure dependence of the surface morphology are explained by this assumption.

Original languageEnglish (US)
Article number073910
JournalJournal of Applied Physics
Volume100
Issue number7
DOIs
StatePublished - Oct 20 2006
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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