Magnetic Study of Metal-Insulator-Metal Transitions in (DMe-DCNQI-α,α'-d2)2Cu

Temperature dependence of magnetic susceptibility of Cu salt of DMe-DCNQI-α, α'- d 2 has been investigated over the temperature range of the metal-insulator-metal (M-I-M) reentrant transition. The insulating phase of this salt has been revealed to exhibit the same temperature dependence of susceptibility as that of the insulator phase of (DMe-DCNQI- d 8 ) 2 Cu, which shows only a M-I transition. In the reentrant metallic phase, there is no sizable enhancement of susceptibility such as expected from the specific heat enhancement.