New BEDT-TTF-based Organic Conductor Including an Organic Anion Derived from the TEMPO Radical,alpha-(BEDT-TTF)_3(TEMPO-NHCOCH_2SO_3)_2(centre dot)6H_2O

摘要

We report the genuine-organic magnetic conductor including organic free radical as a part of a counter anion,alpha-(BEDT-TTF)_3(TEMPO-NHCOCH_2SO_3)_2(centre dot)6H_2O,which consists of the conducting layers of the BEDT-TTF cations arranged in the alpha-packing mode and the magnetic layers of the TEMPO-NHCOCH_2SO_3 anions with water molecules alternatively along the c axis.In the magnetic layer,TEMPO groups gather to form a 1-D ferromagnetic network.The salt is semiconductive (rho_(RT)=5.1 OMEGA(centre dot)cm) adn E_a=0.050 eV)and its temperature-dependent susceptibiity obeys the 1-D ferromagnetic Heisenberg model (C=0.380 emu/mol K and J=+0.42 K).