Journal
EUROPEAN PHYSICAL JOURNAL E
Volume 18, Issue 3, Pages 287-293Publisher
SPRINGER
DOI: 10.1140/epje/e2005-00034-9
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We have studied binary two-dimensional (2D) mixtures of superparamagnetic colloidal particles interacting through magnetic dipole moments, which were induced by an external magnetic field B. By tuning B the effective system temperature could be widely adjusted. Time-dependent particle coordinates measured by video-microscopy provide radial pair-distribution functions, mean-square displacements as well as evidence for heterogeneous dynamics. Characteristic features of 3D glass formers are observed experimentally in 2D for the first time.
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