Ferromagnetic Behavior of 1/2-TCNQ/TCNQ(-.) Mixed Salts at Room-Temperature

Sugimoto T; Ueda K; Endo S; Toyota N; Kohama M; Yamamoto K; Morimoto H; Yamaguchi T; Suenaga Y; Munakata M; Hosoito N; Kanehisa N; Shibamoto N; Kai Y

Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol.305, 217-226, 1997

DOI10.1080/10587259708045059 Export Citation

Ferromagnetic Behavior of 1/2-TCNQ/TCNQ(-.) Mixed Salts at Room-Temperature

Sugimoto T, Ueda K, Endo S, Toyota N, Kohama M, Yamamoto K, Morimoto H, Yamaguchi T, Suenaga Y, Munakata M, Hosoito N, Kanehisa N, Shibamoto N, Kai Y

Ferromagnetic behavior at room temperature was observed in the tetramethylammonium (NMe4+) and cesium (Cs+) salts of tetracyanoquinodimetfiane (TCNQ) and its radical anion (TCNQ(-.)) in a molecular ratio of 1:2. The saturation magnetizarions and coercive forces are 0.79 emu/mol and ca. 300 Oe for (NMe(4)(+.)TCNQ(-.))(.)1/2TCNQ, and 1.46 emu/mol and ca. 100 Oe for (Cs(+.)TCNQ(-.))(.)1/2TCNQ, respectively. In contrast, the 1:1 TCNQ/TCNQ(-.) mixed tetraethyammonium (NEt4+) salt, (NEt(4)(+.)TCNQ(-.))(.)TCNQ, exhibited no ferromagnetic behavior at room temperature and also at lower temperatures.