title: Ultrafast quenching of binary colloidal suspensions in an external magnetic field.
abstract: An ultrafast quench is applied to binary mixtures of superparamagnetic colloidal particles confined at a two-dimensional water-air interface by a sudden increase of an external magnetic field. This quench realizes a virtually instantaneous cooling which is impossible in molecular systems. Using real-space experiments, the relaxation behavior after the quench is explored. Local crystallites with triangular and square symmetry are formed on different time scales, and the correlation peak amplitude of the small particles evolves nonmonotonically in time in agreement with Brownian dynamics computer simulations.
authors: Institut für Theoretische Physik II: Weiche Materie, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, D-40225 Düsseldorf, Germany.
authors: Lahcen
authors: L
authors: Assoud
authors: Florian
authors: F
authors: Ebert
authors: Peter
authors: P
authors: Keim
authors: René
authors: R
authors: Messina
authors: Georg
authors: G
authors: Maret
authors: Hartmut
authors: H
authors: Löwen