Researchers from the Helmholtz Center in Berlin developed a new magnetic valve that can be used for data storage or information processing. The new structure allows an indefinite number of re-write cycles.
The researchers created a defined anisotropy with two thin, stacked ferromagnetic layers: they wanted to create a structure in which a magnetic characteristic within the material changes in a well defined way. They added a third non-magnetic layer (made of Tantalum) between the two layers, which made the whole structure behave like a spin valve.
The researchers patented the new design.