We briefly review, showing some examples, the current state of magnetic materials containing transition metal and lanthanide ions coupled to nitronyl nitroxide organic radicals. Results obtained with a purely organic ferromagnet, NITSMe, are also illustrated. The case of one molecule containing Mn(lI) ions and nitronyl nitroxide radicals coordinated in a monodimensional structure motiv and possessing non-linear optical activity together with 3D magnetic phase transition is showed. Unusual behavior observed in monodimensional linear chains containing lanthanide ions and nitronyl nitroxide radicals is presented and discussed. Proofs of the excitation of "chiral" domain walls, predicted by I. Harada in 1984, have been found in these frustrated spins systems through specific heat and low temperature low field magnetic measures. Thermodynamic properties were reproduced by using the transfer matrix calculation formalism.