  We consider the Bianchi type-$VI_0$ space time with domain walls in the
framework of the modified $f (R, T)$ theory of gravitation. To solve the field
equations, we assume that the shear scalar $(\sigma)$ is proportional to the
expansion scalar $(\theta)$. We also consider the parametrization of the
equation of the state parameter of barotropic fluid and discuss the effect on
domain walls. It has been observed that the domain wall may behave like dark
energy. Some physical parameters are also discussed in detail.
