Open AccessLaser ablation synthesis of monodispersed magnetic alloy nanoparticles
Author(s) -
Takafumi Seto,
Kenji Koga,
Hiroyuki Akinaga,
Fumiyoshi Takano,
Takaaki Orii,
Makoto Hirasawa
Publication year - 2005
Publication title -
journal of nanoparticle research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.453
H-Index - 121
eISSN - 1572-896X
pISSN - 1388-0764
DOI - 10.1007/s11051-005-9010-4
Subject(s) - materials science , alloy , nanoparticle , laser ablation , ferromagnetism , magnetic hysteresis , hysteresis , shell (structure) , pulsed laser deposition , chemical engineering , laser , analytical chemistry (journal) , nanotechnology , composite material , thin film , magnetization , optics , magnetic field , chromatography , condensed matter physics , physics , engineering , chemistry , quantum mechanics
Monodispersed CoPt alloy nanoparticles were synthesized by a pulsed laser ablation (PLA) technique coupled with a low-pressure operating differential mobility analyzer (LP-DMA). The CoPt alloy nanoparticles were generated by laser ablating a solid Co–Pt target. In CoPt alloy nanoparticles synthesized from a target with a Co composition of 75 at%, the nanoparticle surfaces were covered by an oxide layer and exhibited a core-shell structure. In contrast, no shell was observed in particles generated from a target with a Co:Pt ratio of 50:50 at%. According to an EDX analysis, the compositions of the individual nanoparticles were almost the same as that of the target material. Finally, the magnetic hysteresis loops of the CoPt alloy nanoparticles exhibited ferromagnetism.
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