Structural and magnetic properties of hcp and fcc Ni nanoparticles

Preparation of hexagonal close-packed nickel nanoparticles via a thermal decomposition approach using nickel acetate tetrahydrate as a precursor

“…The unit cell parameters of the sample without alkylphosphine surfactants is estimated to be a = 0.2647 nm, c = 0.4333 nm, and a/c = 1.637; with TOPO as surfactant is estimated to be a = 0.265 nm, c = 0.4336 nm, and a/c = 1.636; with TOP as surfactant is estimated to be a = 0.2655 nm, c = 0.4353 nm, and a/c = 1.639, respectively. The obtained unit cell parameters in this study are close to many references [13][14][15]24,25,[31][32][33]37] on hcp Ni, although some references [12,20,30,36] have also reported smaller unit cell parameters (a value less than 0.26 nm). The measured c/a values for the assynthesized samples are around 1.63, which is a characteristic of close-packed arrangement.…”

“…Early magnetic studies on hcp Ni thin films [18,24] have shown that hcp Ni films were nonmagnetic with a zero magnetic moment at room temperature, which is in contrast to ferromagnetic fcc Ni. Recent studies on hcp Ni nanoparticles have also shown that their magnetic behaviors are quite different from those of fcc Ni nanoparticles [32][33][34]37].…”

Nanoparticles Ni and NiO: Synthesis, characterization and magnetic properties

“…Methods to produce Ni nanoparticles can be found in the literature and involve electrochemical reduction [14], chemical reduction [15,16], and sol-gel [17]. Recently, the use of organometallic precursors has been proven interesting since it leads to particles with controlled size, surface coordination, and crystallinity that are monodisperse to ±1 atomic shell [18].…”

Synthesis of Nickel Nanoparticles using Electron Beam Irradiation

“…Nickel nanoparticles have produced many methods in the literature such as electrical, chemical reduction, sol-gel reaction [2], micro emulsion [3], thermal decomposition, hydrothermal [4], reducing agent using [5][6][7], and polyol process. Although there are various synthesis methods of nickel nanoparticles, thermal decomposition is a conventional method used to produce stable monodispersed nanoparticles [8].…”