Fabrication of ferromagnetic ni(111) nanoparticles embedded epitaxially in (Mg,Ni)O matrix by reduction of (Mg0:5Ni0:5)O(111) epitaxial thin film

Hideki Arai, Ryosuke Yamauchi, Takanori Kiguchi, Koji Koyama, Keisuke Kobayashi, Toshimasa Suzuki, Takao Sasagawa, Yushi Kato, Nobuo Tsuchimine, Susumu Kobayashi, Masahiko Mitsuhashi, Satoru Kaneko, Mamoru Yoshimoto

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1 Citation (Scopus)

Abstract

The ferromagnetic Ni nanoparticles could be epitaxially dispersed in the (Mg,Ni)O matrix by the oxide reduction. For this purpose, the epitaxial (Mg0:5Ni0:5)O thin film was grown at room temperature by pulsed laser deposition and successively reduced at 700-C in hydrogen gas atmosphere. X-ray diffraction confirmed in-plane and out-of-plane epitaxial precipitation of Ni nanoparticles in the (Mg,Ni)O matrix by selective reduction of the Ni-O part in the epitaxial (Mg0:5Ni0:5)O thin film. Atomic-scale analyses indicated uniform dispersion of Ni nanoparticles (∼20 nm average size) in the (Mg,Ni)O matrix. Magnetic measurement confirmed ferromagnetic property of the Ni nanoparticle-containing (Mg,Ni)O thin films.

Original languageEnglish
Article number070206
JournalJapanese journal of applied physics
Volume50
Issue number7 PART 1
DOIs
Publication statusPublished - 2011 Jul

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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