Magnetic order of Au nanoparticle with clean surface

Ryuju Sato, Soichiro Ishikawa, Hiroyuki Sato, Tetsuya Sato

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Au nanoparticles, which are kept in vacuum after the preparation by gas evaporation method, show ferromagnetism even in 1.7 nm in diameter. The intrinsic magnetism is examined by detecting the disappearance of spontaneous magnetization in Au bulk prepared by heating the nanoparticles without exposure to the air. The temperature dependence of spontaneous magnetization is not monotonic and the increase in magnetization is observed after Au nanoparticles are exposed to the air. The magnetic behavior can be interpreted by the ferrimagnetic-like core-shell structure with shell thickness of 0.16±0.01 nm and magnetic moment of (1.5±0.1)×10-2 μB/Au atom, respectively.

Original languageEnglish
Pages (from-to)209-212
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume393
DOIs
Publication statusPublished - 2015 Jun 4

Keywords

  • Au nanoparticle
  • Ferromagnetism
  • Gas evaporation method

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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