NEW MAGNETIC SEMICONDUCTING COMPOUNDS : THE RARE EARTH OXYNITRIDES Eu2+1-x Ln3+xO1-xNx (Ln3+ = Nd3+, Eu3+, Gd3+) J. Etourneau, B.Chevalier, P. Hagenmuller et R. Georges J. Phys. Colloques, 41 C5 (1980) C5-193-C5-204 DOI: 10.1051/jphyscol:1980534