  We propose an experimental scheme to create spin-orbit coupling in spin-3 Cr
atoms using Raman processes. Employing linear Zeeman effect and optical Stark
shift, two spin states within the ground electronic manifold are selected,
which results in a pseudo-spin-1/2 model. We further study the ground state
structures of a spin-orbit-coupled Cr condensate. We show that, in addition to
the stripe structures induced by the spin-orbit coupling, the magnetic
dipole-dipole interaction gives rise to the vortex phase, in which spontaneous
spin vortex is formed.
