Pressure effects on organic radicals with ferromagnetic and antiferromagnetic interactions

Magnetic properties of stable organic biradicals under pressure are presented. The dimensional crossover from two-dimension to one-dimension is induced by pressure in F2PNNNO, whereas the properties of the corresponding one-dimensional material, PNNNO is almost independent of the pressure. The phase transition temperature of the quasi-one-dimensional antiferromagnet, PIMNO become higher with applied pressure. The increase of the interchain interactions by pressurization has been observed, whereas the intrachain interactions are almost independent of the pressure.