Origin of ferromagnetism in cyano-bridged compounds containing d(1) octacyanometallates

Expalining the magnetism in cyanide-based magnets: The origin of ferromagnetism (F) in the recently synthesized heteronuclear cyanide-bridged cluster and three dimensional (3D) networks containing octacyanometallates is elucidated. The main factor is the orthogonality of the "magnetic orbitals" of the octametallates to the σ orbitals of all the bridging cyanides, which strongly reduces the antiferromagnetic of these compounds. The kinetic contribution to the superexchange is shown schematically, the arrows show the direction of the electron transfer.status: publishe