Bedo-TTF Complexes with Magnetic Counter Ions

Abstract

For both of the single crystals of (BEDO-TTF) 9 (NiBr 4 ) 2 (CH 2 Cl-CH 2 Cl) 5 and the powder sample of (BEDO-TTF) 3 [FeCr(ox) 3 ](H 2 O) 3.5 in which the counter ions posses paramagnetic and ferromagnetic localized spins, respectively, the metallic behavior of the electrical conductivity was observed down to low temperatures. The former complex showed the isostructural crystal packing and exhibited the similar properties to those of (BEDO-TTF) 9 (HgBr 4 ) 2 (CH 2 Cl-CH 2 Cl) 5 in the conducting behavior and spontaneous loss of the solvent of crystallization. The FeCr(ox) 3 complex is a metallic molecular ferromagnet below ca. 11 K. The ESR spectra showed the anomalous behavior below around the Curie temperature, though no effects of the magnetically ordered localized spins on the conducting property were detected.