A magnetoresistance effect devices having a magnetization free layer free to rotate in an applied magnetic field. The magnetization free layer may include first and second ferromagnetic material layers with a nonmagnetic material layer disposed between the two ferromagnetic material layers. Those ferromagnetic...http://www.google.com.au/patents/US6730949?utm_source=gb-gplus-sharePatent US6730949 - Magnetoresistance effect device
