Dynamics of magnetized colloids on a disordered substrate

Y.G. Cao and Q.X. Li

Physica A: Statistical Mechanics and its Applications, 2008, vol. 387, issue 19, 4755-4759

Abstract: Using Langevin simulations, we study numerically the dynamics of two-dimensional magnetized colloids on a disordered substrate. With an increase in the strength of substrate, we find a crossover from elastic to plastic depinnings. In the elastic regime with weak substrates, a power-law relationship between average velocity and applied driving is found to be different from that in charged colloids. In the plastic regime with strong substrates, we find a dynamic transition from the plastic flow to a moving smectic as the drive is increased high above the depinning, as well as a transition from the moving smectic to a moving crystal at high enough drives.

Keywords: Magnetized colloid; Dynamics (search for similar items in EconPapers)
Date: 2008
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:387:y:2008:i:19:p:4755-4759

DOI: 10.1016/j.physa.2008.04.026

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