  Spin rectification in a single crystal Fe/Au/Fe sandwich is electrically
detected for collinear and non-collinear magnetization and external magnetic
field configurations. The line shape, line width and signal polarity are
analysed. The spin rectication theory has been much extended by taking the
magneto-crystalline anisotropy and shape anisotropy into account, which
explained non-collinear resonances and agrees very well with experimental data.
Thus, a comprehensive understanding of spin rectification in ferromagnetic
metal was demonstrated in this work.
