Direct Synthesis of Isolated L10-FePtCu Nanoparticles by RF-Magnetron Sputtering

Han Wool Ryu; Kazuhisa Sato; Yoshihiko Hirotsu

doi:10.4028/www.scientific.net/SSP.127.129

Paper Titles

Transmission Electron Microscopy Observations on Cu-Mg Alloy Systems
p.103

Oxidation Behavior of SiC/TiAl Composite Material
p.109

Reaction of Sn to Nanocrystalline Surface Layer of Cu by Near Surface Severe Plastic Deformation
p.115

Interfacial Residual Stresses in Semiconductor Devices Measured on the Nano-Scale by Cathodoluminescence Piezospectroscopy
p.123

Direct Synthesis of Isolated L1₀-FePtCu Nanoparticles by RF-Magnetron Sputtering
p.129

TEM Studies on Phase Stability in Nanometer-Sized Alloy Particles
p.135

Electron Dose Rate Dependence of Phase Separation Induced by Electronic Excitation in GaSb Nanoparticles
p.141

Temperature Dependence of Internal Stress and Crystal Growth of Dilute Cu Alloy Films
p.147

In Situ Synthesis of Hybrid-Reinforced Titanium Matrix Composites
p.155

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Direct Synthesis of Isolated L1₀-FePtCu Nanoparticles by RF-Magnetron Sputtering

Abstract:

Isolated and oriented hard magnetic FePtCu ternary alloy nanoparticles with the L10-type ordered structure have been directly fabricated by rf-magnetron sputtering onto NaCl substrate kept at 613K without any post-deposition annealing. Structure and morphology of those particles were studied by TEM. When the sputtering duration decreases, the particle size decreases and the particle areal number density increases. These nanoparticles have <100> orientation on the NaCl substrate. Alloy composition distribution from particle to particle examined by nano-beam elemental x-ray analysis was found to be quite small, which can be attributed to the homogeneous structure formed by co-deposition of Fe, Pt and Cu by sputtering. Thermal fluctuation of the magnetization becomes prominent in the specimen with the particle size smaller than about 10nm in diameter.