Tipos de violencia intrafamiliar

Pulsed laser deposition in essence is a very simple technique with many similarities to other physical deposition processes. There are many advantages with PLD apart from its simplicity. Perhaps the two most important ones being the energetic nature of the plume which can aid the formation of specific crystalline thin film states and the ease with which correct stoichiometric transfer can be obtained.

The situations in which PLD can become more complicated are when large uniform areas are required which are totally free from surface debris. The measures that can be taken to overcome these problems have been discussed.

Unfortunately the underlying physics of the creation and development of the ablation plume is complicated. This partially ionised plasma is formed in a time scale of nanoseconds and never reaches equilibrium, further complications arise from the laser-plasma interaction which may lead to the extinction and re growth of the plume in rapid succession. Theory does not predict the energies of ions ejected from the target for high fluences as noted in section 1.3.7. The only way to ascertain the actual energy of particles in the plume is by direct measurement of the plume under conditions similar to those used for deposition.

chapter one ’ Introduction

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