Synthesis of magnetic CoPt/SiO2 core-shell nanoparticles

Takafumi Seto; Kenji Koga; Fumiyoshi Takano; Hiroyuki Akinaga; Takaaki Orii; Makoto Hirasawa; Mitsuhiro Murayama

doi:10.1088/1742-6596/59/1/054

Synthesis of magnetic CoPt/SiO₂ core-shell nanoparticles

Takafumi Seto, Kenji Koga, Fumiyoshi Takano, Hiroyuki Akinaga, Takaaki Orii, Makoto Hirasawa, Mitsuhiro Murayama

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

Core-shell nanoparticles composed of ferromagnetic cobalt platinum cores covered by non-magnetic silica shells were synthesized by laser ablating a composite target in a helium background gas. The average diameter of the CoPt core was controlled by adjusting the CoPt/SiO₂ ratio of the ablation target. The particles were also classified in the gas phase using an electrical mobility classifier. The present method successfully synthesized nearly monodispersed nanoparticles with an average core diameter of 2.5nm. This article describes the synthesis of the core-shell nanoparticles and investigates their magnetic properties.

Original language	English
Article number	054
Pages (from-to)	255-258
Number of pages	4
Journal	Journal of Physics: Conference Series
Volume	59
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/59/1/054
Publication status	Published - Apr 1 2007
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

Access to Document

10.1088/1742-6596/59/1/054

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AU - Seto, Takafumi

AU - Koga, Kenji

AU - Takano, Fumiyoshi

AU - Akinaga, Hiroyuki

AU - Orii, Takaaki

AU - Hirasawa, Makoto

AU - Murayama, Mitsuhiro

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AB - Core-shell nanoparticles composed of ferromagnetic cobalt platinum cores covered by non-magnetic silica shells were synthesized by laser ablating a composite target in a helium background gas. The average diameter of the CoPt core was controlled by adjusting the CoPt/SiO2 ratio of the ablation target. The particles were also classified in the gas phase using an electrical mobility classifier. The present method successfully synthesized nearly monodispersed nanoparticles with an average core diameter of 2.5nm. This article describes the synthesis of the core-shell nanoparticles and investigates their magnetic properties.

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