Magnetic TTF-based charge-transfer complexes

To date, knowledge gained in the basic science has opened new trends of magnetism in the development of the cutting-edge electronic device applications. A variety of TTF-based magnetic charge-transfer complexes have been developed in four kinds of categories: (1) π-based localized magnets, (2) magnets in the Mott-Hubbard boundary, (3) π-d composite insulating magnets, and (4) π-d-based magnetic conductors, which show unconventional magnetic features different from those appearing in traditional magnetic materials. By considering typical examples, the magnetic properties, electronic properties, and structures of a large class of TTF-based magnetic charge-transfer complexes are reviewed. It is illustrated that hybrid systems of charge-transfer complexes obtained based on donors and anions easily combine functions of the constituent building blocks, leading to multifunctional materials.