Researchers from Johns Hopkins University and the US NIST discovered that magnetisation in a cobalt-iron-boron layer could be flipped between stable states using only electric current, without an external magnetic field. The researchers call this effect Zero-Field Switching (ZFS).

ZFE in cobalt-iron-boron layer (JHU / NIST)

The researchers say that this effect was not theoretically predicted, as all previous devices of this type have required a magnetic field or other more complex measures to change the material's magnetisation.