An optically and geometrically thick torus obscures the central engine of Active Galactic Nuclei ( AGN ) from some lines of sight .
From a magnetohydrodynamical framework , the torus can be considered to be a particular region of clouds surrounding the central engine where the clouds are dusty and optically thick .
In this framework , the magnetic field plays an important role in the creation , morphology and evolution of the torus .
If the dust grains within the clouds are assumed to be aligned by paramagnetic alignment , then the ratio of the intrinsic polarisation and visual extinction , P ( % ) /A _ { v } , is a function of the magnetic field strength .

To estimate the visual extinction through the torus and constrain the polarisation mechanisms in the nucleus of AGN , we developed a polarisation model to fit both the total and polarised flux in a 1.2 ^ { \prime \prime } ( \sim 263 pc ) aperture of the type 2 AGN , IC5063 .
The polarisation model is consistent with the nuclear polarisation observed at K _ { n } ( 2.0 - 2.3 \mu m ) being produced by dichroic absorption from aligned dust grains with a visual extinction through the torus of 48 \pm 2 mag .
We estimated the intrinsic polarisation arising from dichroic absorption to be P ^ { \mbox { \small { dic } } } _ { \mbox { \small { K$ { } _ { n } $ } } } = 12.5 \pm 2.7 % .

We consider the physical conditions and environment of the gas and dust for the torus of IC5063 .
Then , through paramagnetic alignment , we estimate a magnetic field strength in the range of 12 - 128 mG in the NIR emitting regions of the torus of IC5063 .
Alternatively , we estimate the magnetic field strength in the plane of the sky using the Chandrasekhar-Fermi method .
The minimum magnetic field strength in the plane of the sky is estimated to be 13 and 41 mG depending of the conditions within the torus of IC5063 .
These techniques afford the chance to make a survey of AGN , to investigate the effects of magnetic field strength on the torus , accretion , and interaction to the host galaxy .