The influence of plasma dynamics on the growth of Sm0.55Nd0.45NiO3 solid solution during pulsed laser deposition

Abstract

Abstract.We report on the presence of an interesting cross-correlation among the deposition parameters which are usually overlooked in the usual empirical approach used by pulsed laser deposition growers. The fast intensified-charge-coupled-device (ICCD) photography imaging studies of the plasma generated by the KrF excimer laser ablation o f Sm 1-x Nd X NiO 3 at x= 0.45 in the presence of oxygen background gases at different pressures i s r e p o r t e d . T h e e x p e r i m e n t a l l y d e t e r m i n e d b e h a v i o u r s a r e c o m p a r e d w i t h t h epredictions of an analytical model which gives a complete description of the expansion of the plume and with some recent results reported in the literature. Evidence of the strong influence of the expansion plasma regime was found which showed that it is not simply related to the overall reactive gas content. Our findings demonstrate that the optimization of the pulsed laser deposition parameters, such as gas pressure, should be perfo rmed a lso ta ki ng i n to acco u nt th e ch em ical p ress ure ind uc ed by t he s ubs tra te nature. The analysis of the experimental results allowed us to estimate the average deposition oxygen pressure for Sm 0.55 Nd 0.45 NiO 3 in the typical range used for Pulsed Laser Deposition (PLD) of complex oxides, showing that the higher is the deposition pressure, the better the crystallinity.

Plume study by ion probe and morphology control during pulsed laser deposition of Sm1−xNdxNiO3

“…However a few works about the plume dynamics has been done [8][9][10]. Our findings join the previous results on the effect of the plume dynamics on the properties of the deposited film [11][12][13][14][15][16][17][18].…”

Investigation of AlN plasma induced by a laser into a vacuum and nitrogen ambience

“…Here, the expansion of fast species is fitted by a shock wave model, 36 described by the following equation: 37 where R is the propagation distance, ε 0 ≈ 1 is a constant related to both geometric and specific heat capacity, ρ 0 is the background gas density and E 0 is the plume energy. The fit shows dependence R ∝ t 0.41 and agrees well with a spherical shock wave model for all fast species expansion (Fig.…”

“…Here, the expansion of fast species is tted by a shock wave model, 36 described by the following equation: 37…”

Ablation plume structure and dynamics in ambient gas observed by laser-induced fluorescence imaging spectroscopy

“…As is often pointed out, the estimated d f value is roughly an order of magnitude larger than the elastic mean free path [50][51][52]. Thus, to check the validity of the obtained d f values, a scattering cross-section () was estimated using the following relation, by assuming that the stopping distance is five-fold of the mean free The parameters for lateral expansion under 0.15 mJ irradiation are also listed in Table 3.…”