Formation of size-selected Ni/NiO core-shell particles by pulsed laser ablation

Article Abstract:

A combination of Pulsed Laser Ablation (PLA) and differential mobility analyzer (DMA) with postannealing and compulsory oxidation to fabricate an isolated Ni core with an NiO shell structure using a newly proposed gas-phase sequential process and method for individual control is discussed. Fabrication of Ni/NiO particles isolated with controlled sizes and surface layers suggest that it may be possible to control their magnetic properties.

Science & research, Research, Usage, Electric properties, Nickel, Chemistry, Physical and theoretical, Physical chemistry, Ablation (Vaporization technology), Laser ablation

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Magnetic properties of monodispersed Ni/NiO core-shell nanoparticles

Article Abstract:

Investigations on the size-dependent magnetic properties of monodispersed Ni/NiO core-shell nanoparticles are carried out. It is found that the drastic change in the hysteresis loops between field-deposited and zero-field-deposited samples is attributable to the strong anisotropy that developed during the magnetic-field-assisted nanostructuring process.

Anisotropy, Hysteresis, Hysteresis (Physics)

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Comparison of the magnetic properties of metastable hexagonal close-packed Ni nanoparticles with those of the stable face-centered cubic Ni nanoparticles

Article Abstract:

A magnetic study is conducted to compare the magnetic properties of the hexagonal close-packed (hcp) Nickel (Ni) nanoparticles with those of the face-centered cubic (fcc) Ni nanoparticles. The hcp particles are found to be antiferromagnetic and paramagnetic, whereas the fcc particles are ferromagnetic and superparamagnetic.

Antiferromagnetism

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