ESR Study of (TMTTF)2BF4 and TTF-TCNQ under Hydrostatic Pressure

Abstract
We have measured the susceptibility, g-factor and linewidth of (TMTTF)2BF4, and TTF-TCNQ single crystals in the 80-300K temperature range up to 5 kbars of hydrostatic pressure in X-band. The decrease of the susceptibility and the increase in the 1inewidth on pressure is less expressed in (TMTTF)2 BF4, than In TTF-TCNQ. The g-factor does not depend on pressure in both cases.