Heavy Atom Ferromagnets under Pressure: Structural Changes and the Magnetic Response

Application of physical pressure to a ferromagnetic bisdiselenazolyl radical leads to a decrease in π-stack slippage. Initially, this leads to an increase in the ferromagnetic ordering temperature TC, which reaches a maximum of 21 K near 1 GPa. At higher pressures, as the π-stacks become more nearly superimposed, the value of TC diminishes.