Magnetic Studies of Tetrathiofulvalinium Tetracyanoquinodimethanide (TTF-TCNQ)

Abstract

EPR and magnetic-susceptibility studies of TTF-TCNQ indicate that in the temperature region $T\gtrsim 60°$ K this compound consists of a metallic ${\mathrm{}\left(\mathrm{TTF}\right)\mathrm{}}^{+}$ chain and a ${\mathrm{}\left(\mathrm{TCNQ}\right)\mathrm{}}^{-}$ chain with localized spins. The metal-insulator transition at ∼ 60°K is accompanied by a strong interchain interaction.