SPIN TRANSFER SWITCHING MAGNETIC ELEMENT FORMED FROM FERRIMAGNETIC RARE EARTH TRANSITION METAL (RE TM) ALLOYS

摘要

A magnetic tunnel junction (MTJ) includes a free layer formed from a ferrimagnetic rare earth transition metal (RE TM) alloy having the net moment dominated by a sublattice moment of a rare earth (RE) composition of the RE TM alloy. The MTJ further includes a pinned layer formed from a rare earth transition metal (RE TM) alloy having the net moment dominated by a sublattice moment of a rare earth (RE) composition of the RE TM alloy the pinned layer comprising one or more amorphous thin insertion layers such that a net magnetic moment of the free layer and the pinned layer is low or close to zero.