USE OF SPIN TRANSITION COMPOUND IN FILM FORM AS A TEMPERATURE SENSOR

Spin transition compounds (SCO spin crossover) are coordination complexes that have the ability to switch between two states of different electronic configuration. The most exploited stimulus when inducing the SCO phenomenon is temperature. Generally, these compounds present durability and stability problems since together with the spin transition there is an important change in the volume of the material. As a consequence, the films lose their initial structure after a few temperature cycles, limiting their applicability in devices to a single use (or a few). In fact, most patents in thermo-optical switching use other types of materials. In order to make real use of the properties of spin transition compounds, two requirements must be met: they must be processable and have a robust and reproducible spin transition reversibility. These factors greatly limit the materials available.