Author/Authors :
Ribera، نويسنده , , Phillip E. and Rovira، نويسنده , , C. and Veciana، نويسنده , , J. and Tarrés، نويسنده , , J. and Canadell، نويسنده , , E. and Rousseau، نويسنده , , R. and Molins-Legua، نويسنده , , E. and Mas، نويسنده , , M. and Schoeffel، نويسنده , , J.P. and Pouget، نويسنده , , J-P and Morgado، نويسنده , , J. and Gama، نويسنده , , M. V. C. Henriques، نويسنده , , R.T. and Almeida، نويسنده , , M.، نويسنده ,
Abstract :
The family of charge transfer salts (DT-TTF)nM(mnt)2, with M=Au, Ni, Pt, Fe and Co, shows a wide range of interesting electrical and magnetic properties. Salts with M=Au, Ni and Pt, with n=2 are isostructural. The Au compound, is a semiconductor and presents a localised regime of charge carriers in DT-TTF chains, behaving as a spin-ladder system. The Ni and Pt analogues have a delocalised regime with higher conductivity at room temperature and a transition to an insulator state at 120 and 127 K respectively. The Fe and Co compounds form ionic salts with n=1 and present poorer semiconducting properties. For M=Fe, crystals of different morphologies and the observation of three different transport properties denote the existence of different phases.
