Xin Jiang Roger Wang Robert M. Shelby Stuart S. P. Parkin Highly efficient room-temperature tunnel spin injector using CoFe/MgO(001). 111-120 2006 50 IBM Journal of Research and Development 1 http://dx.doi.org/10.1147/rd.501.0111 db/journals/ibmrd/ibmrd50.html#JiangWSP06