  Pair particle creation is a well-known effect on the domain of field theory
in curved space-time. It is shown that the entanglement generations for spin-0
and spin-1/2 modes are different in Friedmann-Robertson-Walker (FRW)
space-time. We consider the spin-1 particles in FRW space-time using
Duffin-Kemmer-Petiao (DKP) equation and obtain a measure of the generated
entanglement. Also, we consider the spin-3/2 particles. We argue that the
absolute value of the spin does not play any role in entanglement generation
and the differences are due to the bosonic or fermionic properties.
