Electrical conduction and electron spin resonance studies on the mixed crystals of K[Pt1–xAux(mnt)2]·H2O

Abstract

An attempt to control the electronic properties of the bis(mnt) metal complex salt system through use of mixed crystals has been examined (mnt = maleonitriledithiolate). The K[Pt_1–xAu_x(mnt)₂]·H₂O series has been investigated as the ‘modification’ of the central metal. An almost two orders of magnitude higher conductivity was observed for samples having x= 0.04 compared with x= 0. From ESR measurements, a pronounced reduction in g anisotropy for x= 0.04 suggests that the excess of conductivity for x= 0.04 may be attributed to the presence of mobile carriers in the defect states.