What is the history of ferrofluid?

Ferrofluids were discovered in 1960's at NASA Research Centre. Scientists were exploring various techniques to control liquids in space when the solution in the form of a new …idea of magnetic fluid emerged. It was found that its location can be changed by applying magnetic field and magnetic field strength can be used to induce fluidity. Researchers have used ferromagnetic compounds(Cobalt, Iron) and magnetic materials(manganese zinc ferrite) in making ferrofluids. But the maximum research until today has been done on the ferrofluids containing magnetite. (MORE)