“Negative Viscosity” in a Magnetic Fluid

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Science  02 Feb 1996:
Vol. 271, Issue 5249, pp. 614
DOI: 10.1126/science.271.5249.614


Fluids containing colloidal dispersions of magnetic particles exhibit new phenomena, including a reduction in viscosity under some conditions. In his Perspective, Rosensweig reviews the theoretical and experimental state of magnetic fluid studies.