  In astrophysical situations, e.g. in the interstellar medium (ISM), neutrals
can provide viscous damping on scales much larger than the magnetic diffusion
scale. Through numerical simulations, we have found that the magnetic field can
have a rich structure below the dissipation cutoff scale. This implies that
magnetic fields in the ISM can have structures on scales much smaller than
parsec scales. Our results show that the magnetic energy contained in a
wavenumber band is independent of the wavenumber and magnetic structures are
intermittent and extremely anisotropic. We discuss the relation between our
results and the formation of the tiny-scale atomic structure (TSAS).
