A Metallic (EDT-DSDTFVSDS)_2·FeBr_4 Salt:Antiferromagnetic Ordering of d Spins of FeBr_4 Ions and Anomalous Magnetoresistance Due to Preferential pi-d Interaction

摘要

The crystals of cation radical salts of pi donor molecules with magnetic transition metal counteranions usually form alternate stacking structures of the donor and counteranion layers,which are responsible for electrical conductivities and magnetisms of the crystals,respectively.Current interest is directed toward the coexistence of metallic conductivity and ferromagnetism by virtue of a significant pi-d or pi-/interaction between the metal-conducting n electrons on the donor layers and the localized d or f spins on the counteranion layers.