Subnanosecond phase transition dynamics in laser-shocked iron

Laser induced phase transition in iron thin films

Laser Damage Study With Subnanosecond Pulses

This report describes a ruby laser test facility for conducting laser-Induced damage experiments with single subnanosecond IISBE. The facility includes a laser damape monitoring system and a mode-locked oscillator-amplifier system with pulse selection.

Non-equilibrium phase transition in negotiation dynamics

We introduce a model of negotiation dynamics whose aim is that of mimicking the mechanisms leading to opinion and convention formation in a population of individuals. The negotiation process, as opposed to "herdinglike" or "bounded confidence" driven processes, is based on a microscopic dynamics where memory and feedback play a central role. Our model displays a nonequilibrium phase transition ...

Phase transition at low ̄uences in laser desorption of organic solids: a molecular dynamics study

Molecular dynamics of a short pulse laser irradiation of a molecular crystal are performed to investigate the dependence of the mechanism of ejection on laser ̄uence. We ®nd that at low laser ̄uences molecules are desorbed from a thin surface layer of solid sample. An increase in the laser ̄uence leads to the melting of the surface region and desorption occurs from an overheated melted state. A...

Structural and magnetic dynamics of a laser induced phase transition in FeRh.

We use time-resolved x-ray diffraction and magneto-optical Kerr effect to study the laser-induced antiferromagnetic to ferromagnetic phase transition in FeRh. The structural response is given by the nucleation of independent ferromagnetic domains (τ(1)~30 ps). This is significantly faster than the magnetic response (τ(2)~60 ps) given by the subsequent domain realignment. X-ray diffraction shows...