  We study the formation of an entangled state in a one-dimensional chain of
three nuclear spins system which interact weakly through the Ising type of
interaction and taking into account first and second neighbor interactions. We
can get this entangled state using two pulses ($\pi/2$ and $\pi$ pulses), and
we study the efficiency of getting this entangled state as a function of the
ratio of the second neighbor interaction coupling constant to the first
neighbor interaction coupling constant ($J'/J$). We found that for $J'/J\ge
0.04$, the entangled state is well defined.
