  Realizations of Majorana fermions in solid state materials have attracted
great interests recently in connection to topological order and quantum
information processing. We propose a novel way to create Majorana fermions in
superconductors. We show that an incipient non-collinear magnetic order turns a
spin-singlet superconductor with nodes into a topological superconductor with a
stable Majorana bound state in the vortex core; at a topologically-stable
magnetic point defect; and on the edge. We argue that such an exotic
non-Abelian phase can be realized in extended t-J models on the triangular and
square lattices. It is promising to search for Majorana fermions in correlated
electron materials where nodal superconductivity and magnetism are two common
caricatures.
