Estudos de nanoestruturas magnéticas - nanodiscos com impurezas e nanofitas - Via Monte Carlo Metropolis

Abstract

In this work we have used Monte Carlo Metropolis method applied in magnetic systems to study nanostructures like permalloy nanodisks and nanowires. We divided it in two parts. First, we have studied the behavior of the vortex core surrounded by rings of the impurities in permalloy nanodisks. We have varied the radius and the thickness of the rings and we measure the limit of the applied field for that the vortex core passes through the ring. Second, we have studied the ground states (lowest-energy state) for nanowires to a small region of the phase space. We can identify the spin configurations associated to the these states.