  The spin wave interference is studied in two dimensional Ising ferromagnet
driven by two coherent spherical magnetic field waves by Monte Carlo
simulation. The spin waves are found to propagate and interfere according to
the classic rule of interference pattern generated by two point sources. The
interference pattern of spin wave is observed in one boundary of the lattice.
The interference pattern is detected and studied by spin flip statistics at
high and low temperatures. The destructive interference is manifested as the
large number of spin flips and vice versa.
