E UROPHYSICS L ETTERS Published under the scientific responsability of the EUROPEAN PHYSICAL SOCIETY Incorporating J OURNAL DE PHYSIQUE LETTRES • LETTERE AL NUOVO CIMENTO OFFPRINT Vol. 72 • Number 4 • pp. 658–663 Defect-originated magnetism in carbon-based and non-traditional inorganic compounds: A new class of magnetic materials ∗∗∗ A. N. Andriotis, R. M. Sheetz, E. Richter and M. Menon