Nonstoichiometry as a source of magnetism in otherwise nonmagnetic oxides : magnetically interacting cation vacancies and their percolation

ABSTRACT: Recently, the possibility of inducing ferromagnetism in nonmagnetic insulators1–8 and in C60-based systems9–11 by creating intrinsic point defects, rather than by the more traditional approach of substitution by magnetic ions, has been discussed. Indeed, it appears that such observations o...