What are outer and inner spin complexes

what are outer and inner spin complexes.

The coordination number of central metal in these complexes is 6 having d2sp3 hybridisation. The complexes formed, if have inner d orbitals are called low spin complexes or inner orbital complexes and if having outer d orbitals are called high spin or outer orbital complex. The inner d orbitals are diamagnetic or less paramagnetic in nature hence, they are called low spin complexes.
Low spin complex: [Fe(CN)6]3-

High spin complex: [CoF3]3