[ExI] Liquid Permanent Magnets

[John Clark]

Ferrofluids have been around since 1963 but have only a modest attraction
to an external magnetic field and loose all magnetism once the external
field is removed. In today's issue of the journal Science it is reported
that for the first time a liquid has been found that is Ferromagnetic, that
is to say the attraction to an external magnetic field is much stronger and
even more important it retains it's magnetism even when the external field
is turned off. A liquid permanent magnet could have applications ranging
from robot muscles to steering anticancer drugs to a tumor.

An attractive, reshapable material
<https://science.sciencemag.org/content/365/6450/219>

John K Clark
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