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.