Anomalous Temperature Dependence of the Magnetic Susceptibility of Quasi-One-Dimensional Metals

Abstract

The temperature dependence of the $g$ values measured for the series of alloys ${(\mathrm{TSeF})}_{x}{(\mathrm{TTF})}_{1\ensuremath{-}x}(\mathrm{TCNQ})$ (where TSeF is tetraselenafulvalene, TTF is tetrathiafulvalene, and TCNQ is tetracyanoquinodimethane), $0<~x<~0.68$, in the temperature range $60\mathrm{K}<T<300\mathrm{K}$ is presented. It is shown that the experimentally observed temperature dependence does not agree with the expected behavior based on significant effects of Peierls fluctuations on the magnetic susceptibility.