Anisotropic Magnetoresistance in GaMnAs films
  The magnetoresistance in a series of Ga1-xMnxAs samples with 0.2 =< x =< 0.8 have been measured for three mutually orthogonal orientations of the external magnetic field. The anisotropy magnetoresistance decreases with increasing of the Mn content, which means that the magnetic disorder or defects scattering increases with increasing of Mn content. And also the magneto-crystalline anisotropy increases with increasing of Mn concentration. 
K.Y. Wang, K.W. Edmonds, R.P. Campion, L.X. Zhao, A.C. Neumann, C.T.   Foxon, B.L. Gallagher, and P.C. Main