New Radical Cation Salt Kappa-(Bets)(2)Co0.13mn0.87[N(Cn)(2)](3)With Two Magnetic Metals: Synthesis, Structure, Conductivity And Magnetic Peculiarities

A new metallic radical cation salt kappa-(BETS)(2)Co0.13Mn0.87IN(CN)(2)](3), where BETS is bis(ethylenedithio) tetraselenafulvalene, C10S4Se4H8, has been synthesized. In this salt, a part of Mn2+ ions are replaced by Co2+ which acts as a magnetic dopant with a different effective magnetic moment. Crystal structure, band structure, conducting and magnetic properties of the salt have been studied. Below 30 K the material undergoes a metal-insulator transition, which is suppressed by applying a pressure of similar to 0.5 kbar, leading to a superconducting ground state. While the structural and conducting properties are very similar to those of the parent salt kappa-(BETS)(2)Mn[N(CN)(2)](3), magnetic properties associated with localized moments in the anion layer are found to be surprisingly different. (C) 2017 Elsevier B.V. All rights reserved.