Disk substrate deposition techniques for monodisperse chemically synthesized FePt nanoparticle media

Kodama, Hiroyoshi; Momose, Satoru; Ihara, Nobutaka; Uzumaki, Takuya; Tanaka, Atsushi

doi:10.1063/1.1635980

Cited by 35 publications

(21 citation statements)

References 7 publications

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“…Metal nanoparticles and other metal nanostructures are the basic building blocks in photonics research 12 and it is expected that magnetic nanoparticles will have a dramatic impact on high density magnetic recording 13 and radarabsorbing composite applications. 14 Transition metal nanoparticles, such as Ni, Co, Fe, and Au are of considerable importance for the catalytic growth of nanostructures including carbon nanotubes 11,15,16 and silicon nanowires.…”

Section: Introductionmentioning

confidence: 99%

Pulsed-laser-induced nanoscale island formation in thin metal-on-oxide films

2005

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The mechanisms controlling the nanostructuring of thin metal-on-oxide films by nanosecond pulsed excimer lasers are investigated. When permitted by the interfacial energetics, the breakup of the metal film into nanoscale islands is observed. A range of metals ͑Au, Ag, Mo, Ni, Ti, and Zn͒ with differing physical and thermodynamic properties, and differing tendencies for oxide formation, are investigated. The nature of the interfacial metal-substrate interaction, the thermal conductivity of the substrate, and the initial thickness of the metal film are all shown to be of importance when discussing the mechanism for nanoscale island formation under high fluence irradiation. It is postulated that the resulting nanoparticle size distribution is influenced by the surface roughness of the initial film and the Rayleigh instability criterion. The results obtained are compared with simulations of the heat transfer through the film in order to further elucidate the mechanisms. The results are expected to be applicable to the laser induced melting of a large range of different materials, where poor wetting of substrate by the liquid phase is observed.

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Section: Introductionmentioning

confidence: 99%

Pulsed-laser-induced nanoscale island formation in thin metal-on-oxide films

2005

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“…To improve the microstructure and nanostructure of the fabricated layer, it is necessary that some parameters to be controlled. For example, the increase in the concentration of FePt colloidal solution leads to creation of a thick layer [14]. High evaporation rate of hexane solvent is a problem.…”

Section: Introductionmentioning

confidence: 99%

“…SC method is a nonequilibrium method and the controllable aspects of crystallization of colloidal solution have not yet been found [13][14][15][16]. Islands formation and surface holes are typical problems of SC method [13,15].…”

Section: Introductionmentioning

confidence: 99%

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Size control of L12-FePt3 nanocrystals by spin-coating method

2016

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Annealing is one of the stages of FePt nanoparticles preparation, during which the transition to a compositionally ordered phase occurs. In order to size and shape control of the nanoparticles in the mentioned stage, it is needed that they be distributed on a suitable surface. In the present work, the spin-coating method is suggested for preparing monolayer from L1 2 -FePt 3 nanoparticles colloidal solution on SiO 2 /Si substrates. FePt 3 nanoparticles were gradually deposited as droplets on the center of a 500 rpm rotating substrate. This step was performed in hexane vapor atmosphere without any stopping time. The analyses revealed that a uniform surface distribution was formed so that, after annealing at 600°C for 1 h the 6.1 nm L1 2 -FePt 3 nanoparticles were spherical in shape with standard deviation of 1.5 nm.

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“…In order to achieve these requirements, several studies were reported. [6][7][8][9][10][11][12][13] For example, a small grain and a high perpendicular magnetic anisotropy L1 0 phase has been observed on FePt films using multilayer deposition techniques and a rapid thermal annealing ͑RTA͒ method. In general, an annealing temperature of about 350-550°C is required.…”

Section: Introductionmentioning

confidence: 99%

Magnetic properties and L1 phase formation of FePt films prepared by high current-density ion-beam irradiation and rapid thermal annealing methods

Yokota

Gao

et al. 2005

Journal of Applied Physics

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, "Magnetic properties and L1 0 phase formation of FePt films prepared by high current-density ion-beam irradiation and rapid thermal annealing methods" (2005 We investigated magnetic properties and L1 0 phase formation of FePt films by rapid thermal annealing ͑RTA͒ and high current-density ion-beam irradiation. The sample prepared by RTA at 550°C has ͑001͒ texture and strong magnetic perpendicular anisotropy with H c equal to 6 kOe. The sample irradiated at 5.04 A/cm 2 has H c equal to 10 kOe but has isotropic magnetic properties due to the ͑111͒ texture. The magnetic correlation length of the ion-irradiated sample was about twice as large as that of the RTA sample. This may be due to the inhomogeneity of the L1 0 phase formation in the ion-irradiated film.

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Disk substrate deposition techniques for monodisperse chemically synthesized FePt nanoparticle media

Cited by 35 publications

References 7 publications

Pulsed-laser-induced nanoscale island formation in thin metal-on-oxide films

Pulsed-laser-induced nanoscale island formation in thin metal-on-oxide films

Size control of L12-FePt3 nanocrystals by spin-coating method

Magnetic properties and L1 phase formation of FePt films prepared by high current-density ion-beam irradiation and rapid thermal annealing methods

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