Exchange anisotropy, disorder and frustration in diluted, predominantly ferromagnetic, Heisenberg spin systems

Chenggang Zhou, Malcolm P. Kennett, Xin Wan +2

Motivated by the recent suggestion of anisotropic effective exchange interactions between Mn spins in Ga${}_{1-x}$Mn${}_x$As (arising as a result of spin-orbit coupling), we study thei…