Topological superconductors, in analogy with topological insulators, give the possibility to study new kinds of electronic states that could be possibly exploited in spintronic applications and quantum computing. One of the recent features discovered on type II topological superconductors is a spin rotational symmetry braking which is interpreted as evidence of electronic states where Cooper-pair are in an odd-parity triplet configuration, thus a sign of unconventional superconductivity. These spin triplet pairs produce a magnetic field, and in this proposal, we decided to study the changes that this field produces on the flux lattice line (FLL) of the topological super conductor Nb0.25Bi2Se3, by means of Small Angle Neutron Scattering.