IBM is providing a preview of its new STT-MRAM technology. They have produced a 4-Kbit test device, using a magnetic tunnel junction (MTJ) with MgO tunnel barriers. They say that the new technology could enable a 64-Mbit MRAM (90nm). STT-RAM also uses less power than toggle MRAM.
The STT-RAM is part of the joint-research with TDK, announced in 2007