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<sup>-2</sup> μ<inf>B</inf>/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

Fingerprint

Magnetization
Nanoparticles
nanoparticles
magnetization
Ferromagnetism
air
Magnetism
Air
Magnetic moments
ferromagnetism
Evaporation
magnetic moments
Gases
evaporation
Vacuum
moments
Heating
Atoms
vacuum
temperature dependence

Keywords

  • Au nanoparticle
  • Ferromagnetism
  • Gas evaporation method

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Magnetic order of Au nanoparticle with clean surface. / Sato, Ryuju; Ishikawa, Soichiro; Sato, Hiroyuki; Sato, Tetsuya.

In: Journal of Magnetism and Magnetic Materials, Vol. 393, 04.06.2015, p. 209-212.

Research output: Contribution to journalArticle

Sato, Ryuju ; Ishikawa, Soichiro ; Sato, Hiroyuki ; Sato, Tetsuya. / Magnetic order of Au nanoparticle with clean surface. In: Journal of Magnetism and Magnetic Materials. 2015 ; Vol. 393. pp. 209-212.
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