Unconventional Magnetic and Resistive Hysteresis in an Iodine-Bonded Molecular Conductor

Angew Chem Int Ed Engl. 2015 Aug 24;54(35):10169-72. doi: 10.1002/anie.201503824. Epub 2015 Jul 15.

Abstract

Simultaneous manipulation of both spin and charge is a crucial issue in magnetic conductors. We report on a strong correlation between magnetism and conductivity in the iodine-bonded molecular conductor (DIETSe)2 FeBr2 Cl2 [DIETSe=diiodo(ethylenedithio)tetraselenafulvalene], which is the first molecular conductor showing a large hysteresis in both magnetic moment and magnetoresistance associated with a spin-flop transition. Utilizing a mixed-anion approach and iodine bonding interactions, we tailored a molecular conductor with random exchange interactions exhibiting unforeseen physical properties.

Keywords: conducting materials; iodine; magnetic properties; organic-inorganic hybrid composites; random exchange interaction.