Vortex imaging in unconventional superconductors

► Vortex structures imaged in unconventional superconductors. ► No evidence for chiral domain walls in Sr2RuO4. ► Vortex lattice in Sr2RuO4 undergoes triangular: square structural transition. ► Superfluid density for Co-doped SrFe2As2 and BaFe2As2 well fit by two band model. ► Fit parameters give insights into symmetry of order parameter in pnictide crystals.